1👍
✅
max_length
of django Permission.name
is 50:
https://github.com/django/django/blob/1.6c1/django/contrib/auth/models.py#L71
And you have permission with name 'Can delete event participant check in location stats user'
which length is 57. Thats why django crashes.
I think you can change name of your permissions.
Source:stackexchange.com