Migration issue

[FabriceSalvaire]

I have this error when I run manage.py makemigrations

  File "/home/opt/python-virtual-env/django-cms/lib/python3.7/site-packages/cmsplugin_contact/migrations/0003_auto__add_field_contact_form_name.py", line 3, in <module>
    from south.db import db
  File "/home/opt/python-virtual-env/django-cms/lib/python3.7/site-packages/south/db/__init__.py", line 84, in <module>
    db = dbs[DEFAULT_DB_ALIAS]
KeyError: 'default'

[FabriceSalvaire]

And if I link migrations_django to migrations, I got a on_delete issue