ValueError invalid literal for int() with base 10: '2,'

[pintuiitbhi]

Following error I am getting will I start taking quiz:

Request Method:	GET
http://127.0.0.1:8000/test/test/take/
1.10
ValueError
invalid literal for int() with base 10: '2,'
/home/pintu/djangogirls/myvenv/lib/python3.6/site-packages/django/db/models/fields/init.py in get_prep_value, line 1832
/home/pintu/djangogirls/myvenv/bin/python
3.6.0

Traceback Switch to copy-and-paste view

/home/pintu/djangogirls/test/models.py in user_sitting
sitting = self.get(user=user, quiz=quiz, complete=False)

During handling of the above exception (Sitting matching query does not exist.), another exception occurred:

/home/pintu/djangogirls/test/views.py in dispatch
self.quiz) ...
▶ Local vars
/home/pintu/djangogirls/test/models.py in user_sitting
sitting = self.new_sitting(user, quiz) ...
▶ Local vars
/home/pintu/djangogirls/test/models.py in new_sitting
user_answers='{}')

[GoodnessEzeokafor]

Having the same issue