About Removing Third-party Django Apps

Here's how you can remove a third-party Django app (let's call it django-external-app):

1. Create a database backup.
2. Remove all the relational fields in your apps referencing the models of django-external-app, create migrations, migrate.
3. Remove all the lines in your migrations of your apps that added, altered, or removed relations to django-external-app models. But keep the migration files.

4. Unmigrate all migrations for django-external-app like so:

   (venv)$ python manage.py migrate external_app zero

5. Remove any code in your project related to django-external-app.

6. Uninstall django-external-app.