error saving features in stable

[sentry-io]

Sentry Issue: PLOTS2-6Y

Mysql2::Error: Duplicate entry '0' for key 'index_node_vid'
  app/controllers/features_controller.rb:43:in `block in create'
    @node.save!
  app/controllers/features_controller.rb:42:in `create'
    ActiveRecord::Base.transaction do
...
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ActiveRecord::RecordNotUnique: Mysql2::Error: Duplicate entry '0' for key 'index_node_vid': INSERT INTO `node` (`type`, `title`, `uid`, `changed`, `path`, `slug`) VALUES ('feature', 'home-intro-test', 1, 1556811072, '/feature/home-intro-test', 'home-intro-test')

ActiveRecord::RecordNotUnique: Mysql2::Error: Duplicate entry '0' for key 'index_node_vid': INSERT INTO `node` (`type`, `title`, `uid`, `changed`, `path`, `slug`) VALUES ('feature', 'home-intro-test', 1, 1556811072, '/feature/home-intro-test', 'home-intro-test')

[jywarren]

Thank you Sentry! This was caught in stable, actually!

Follow-up from #5612

[jywarren]

Aha! I think there's a stray entry in the stable database -- a node record with vid=0. This could also be stopping #5605 on stable and not in tests!

[jywarren]

Solved!!!