Error after changing Django database from SQLite3 to PostgreSQL

Question

I have changed an existing database for a Django project from SQLite3 to PostgreSQL and moved all the data with dumpdata and loaddata commands. When I'm running the server, It's giving me the following error -

ContentType 19 for <class 'easy_thumbnails.models.ThumbnailDimensions'> #233 does not point to a subclass!

I'm using django-filer which has a dependency on easy_thumbnails. I'm guessing the error is coming from there.

I have checked this link and followed teewuane's answer to reorder the django_content_type table but still no luck.

Edit: Tried excluding contenttypes and auth.permission by using -

python manage.py dumpdata --exclude auth.permission --exclude contenttypes > db.json

After loading this data into a new created PostgreSQL database, the error still persists.

Answer 1

Error fixed by using --natural-foreign and --natural-primary flags with dumpdata command.

python manage.py dumpdata --natural-foreign --natural-primary --exclude auth.permission --exclude contenttypes > db.json