`migrate` command raises a warning about uncaptured model changes

[jeremystretch]

NetBox version

v3.6.0

Python version

3.8

Steps to Reproduce

1. Run manage.py migrate (which is called by the upgrade script)
2. Inspect the command output

Expected Behavior

The command should apply any outstanding migrations or return the message "No migrations to apply." without any warnings.

Observed Behavior

The command completes successfully but raises a warning about unreflected model changes:

$ ./manage.py migrate
Operations to perform:
  Apply all migrations: account, admin, auth, circuits, contenttypes, core, dcim, django_rq, extras, ipam, sessions, social_django, taggit, tenancy, users, virtualization, wireless
Running migrations:
  No migrations to apply.
  Your models in app(s): 'circuits', 'core', 'dcim', 'extras', 'ipam', 'tenancy', 'users', 'virtualization', 'wireless' have changes that are not yet reflected in a migration, and so won't be applied.
  Run 'manage.py makemigrations' to make new migrations, and then re-run 'manage.py migrate' to apply them.