Celery 6.x will drop support for some deprecated settings, and it will require to explicitly set CELERY as the prefix.

https://docs.celeryq.dev/en/stable/userguide/configuration.html#new-lowercase-settings

They do provide a tool for renaming the settings, but we should also check for settings set from the ops repos.

https://docs.celeryq.dev/en/stable/history/whatsnew-4.0.html#latentcall-django-admonition