To replicate:
- On one terminal, run
DOCKER_BUILDKIT=1 docker compose up --build
- On a separate terminal, create a superuser:
docker-compose run --rm server bash -c "python manage.py createsuperuser"
- Login to admin and go to http://localhost:8080/admin/example/parent/add/
- Populate the form and save
- You should see the error similar to the screenshot