Stacktrace on confirmation

[Ruftruy]

module: purchase_discount
version: 16.0

Steps to reproduce

• Create purchase order and enter a purchase discount in a purchase orderline.
• On confirmation of the PO I get the following stacktrace:
• `RPC_ERROR
  Odoo Server Error
  Traceback (most recent call last):
  File "/vig-16-test/server/odoo/http.py", line 1583, in _serve_db
  return service_model.retrying(self._serve_ir_http, self.env)
  File "/vig-16-test/server/odoo/service/model.py", line 134, in retrying
  result = func()
  File "/vig-16-test/server/odoo/http.py", line 1610, in _serve_ir_http
  response = self.dispatcher.dispatch(rule.endpoint, args)
  File "/vig-16-test/server/odoo/http.py", line 1808, in dispatch
  result = self.request.registry['ir.http']._dispatch(endpoint)
  File "/vig-16-test/server/odoo/addons/base/models/ir_http.py", line 154, in _dispatch
  result = endpoint(**request.params)
  File "/vig-16-test/server/odoo/http.py", line 696, in route_wrapper
  result = endpoint(self, *args, **params_ok)
  File "/vig-16-test/server/addons/web/controllers/dataset.py", line 46, in call_button
  action = self._call_kw(model, method, args, kwargs)
  File "/vig-16-test/server/addons/web/controllers/dataset.py", line 33, in _call_kw
  return call_kw(request.env[model], method, args, kwargs)
  File "/vig-16-test/server/odoo/api.py", line 461, in call_kw
  result = _call_kw_multi(method, model, args, kwargs)
  File "/vig-16-test/server/odoo/api.py", line 448, in _call_kw_multi
  result = method(recs, *args, **kwargs)
  File "/vig-16-test/server/addons/purchase/models/purchase.py", line 495, in button_confirm
  order.button_approve()
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 111, in button_approve
  self._create_picking()
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 241, in _create_picking
  moves = order.order_line._create_stock_moves(picking)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 582, in _create_stock_moves
  for val in line._prepare_stock_moves(picking):
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 483, in _prepare_stock_moves
  price_unit = self._get_stock_move_price_unit()
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  ...
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 387, in write
  moves.write({'price_unit': line._get_stock_move_price_unit()})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 73, in _get_stock_move_price_unit
  self.price_unit = price
  File "/vig-16-test/server/odoo/fields.py", line 1320, in set
  records.write({self.name: write_value})
  File "/vig-16-test/custom/3rdparty/purchase_discount/models/purchase_order.py", line 139, in write
  res = super().write(vals)
  File "/vig-16-test/server/addons/purchase_stock/models/purchase.py", line 382, in write
  result = super(PurchaseOrderLine, self).write(values)
  File "/vig-16-test/server/addons/purchase/models/purchase.py", line 1129, in write
  return super(PurchaseOrderLine, self).write(values)
  File "/vig-16-test/server/addons/analytic/models/analytic_mixin.py", line 76, in write
  return super().write(vals)
  File "/vig-16-test/server/odoo/models.py", line 3656, in write
  self.check_access_rights('write')
  File "/vig-16-test/server/odoo/models.py", line 3442, in check_access_rights
  return self.env['ir.model.access'].check(self._name, operation, raise_exception)
  File "/vig-16-test/server/odoo/addons/base/models/ir_model.py", line 1846, in check
  has_access = model in self._get_allowed_models(mode)
  File "", line 2, in _get_allowed_models
  File "/vig-16-test/server/odoo/tools/cache.py", line 85, in lookup
  r = d[key]
  File "", line 2, in getitem
  File "/vig-16-test/server/odoo/tools/func.py", line 86, in locked
  with getattr(inst, lock_attr):
  RecursionError: maximum recursion depth exceeded while calling a Python object

The above server error caused the following client error:
RPC_ERROR: Odoo Server Error
at makeErrorFromResponse (https://vigotec-test.callista.be/web/assets/447-d026302/web.assets_backend.min.js:977:163)
at XMLHttpRequest. (https://vigotec-test.callista.be/web/assets/447-d026302/web.assets_backend.min.js:985:13)`

Current behavior
Stacktrace appears on confirmation of the purchase order.

Expected behavior
Purchase Order is confirmed after confirmation.