mailman3-web error when upgrading to bookworm

I tried to upgrade bullseye machien to bookworm, so I got the following error:

File “/usr/lib/python3/dist-packages/django/contrib/auth/”, line 5, in
from django.contrib.auth.views import redirect_to_login
File “/usr/lib/python3/dist-packages/django/contrib/auth/”, line 20, in
from django.utils.http import (
ImportError: cannot import name ‘url_has_allowed_host_and_scheme’ from ‘django.utils.http’ (/usr/lib/python3/dist-packages/django/utils/

During handling of the above exception, another exception occurred:

It is similar to #1000810, but it is already closed.

My solution is:

  • apt remove mailman3-web
    • keep db and config files (do not purge)
  • apt autoremove
    • remove django related packages
  • apt install mailman3-web mailman3-full

I tried to send to the report, but it rerutns `550 Unknown or archived bug’ …






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