django.db.utils.IntegrityError: column “venue_city” contains null values

Question

I have read a lot of other posts here on stackoverflow and google but I could not find a solution.

It all started when I changed the model from a CharField to a For

Answer 1

I solved it by just adding null = True to both the (automatically generated) migration file that was causing the issue and in the Model. Then migrate again and your failed migration will now succeed. As you changed it also in your model, makemigration will detect no changes after that.