Non so perchè non si era preso dentro queste modifiche nella migrazione 29

admin_interface/migrations/0029_auto_20221025_1559.py

@@ -1,7 +1,9 @@
 # Generated by Django 4.0.3 on 2022-10-25 13:59
 
-from django.db import migrations
-from django.db import transaction, connection
+from django.conf import settings
+import django.db.models.deletion
+from django.db import connection, migrations, models, transaction
+
 
 def forward(apps, schema_editor):
     Theme = apps.get_model("admin_interface", "Theme")