- Cut the app to the destinated directory.
- Check existing
migration.py,views.py,urls.py,setting.py, 'apps.py'.
I fixed it by going into all of the migration files and renaming these lines:
field=models.ForeignKey(default=1, null=True, on_delete=django.db.models.deletion.CASCADE, to='books.models.Topic'),
to:
field=models.ForeignKey(default=1, null=True, on_delete=django.db.models.deletion.CASCADE, to='books.Topic')
