Readonly mode of Netbox failing as of v4

[PieterL75]

I have an HA setup of my NetBox.
I use Postgres WAL and rsync (for the images, scripts, etc etc) to keep my standby node up to date.
In the past, setting the MAINTENANCE_MODE and SESSION_FILE_PATH worked just fine.

However (it think) as of v4.0, NetBox fails to start when the database is in readonly mode.
The traceback goes back to

   File "/opt/netbox/netbox/extras/querysets.py", line 159, in valid_models
    content_types = ContentType.objects.get_for_models(*apps.get_models()).values()
  File "/opt/netbox/venv/lib/python3.10/site-packages/django/contrib/contenttypes/models.py", line 100, in get_for_models
    ct = self.create(

A get_for_models of the ContentType results in a self.create, causing a database write.

Anyone who is having the same issue, and found a solution/workaround ?