Thomas Krichel writes:
On my fresh install I am running into problems with the alembic number.
I failed to reproduce with Debian stable, Python 3.11.2-1+b1.
Did you reuse the virtual environment? Did you reinitialize the PostgreSQL 'mailman3' database?
In any case, I suggest activating the virtual environment, then
python -m pip install --upgrade alembic==1.18.4, reinitializing the
'mailman3' database in PostgreSQL, and then starting Mailman.
If you did any work on your Mailman instance (like creating domains and lists, or migrating lists from another list manager), you should back up the 'mailman3' database first. I can't really help you with that, but there's a good chance here somebody knows how to save you some work if you have a backup of the database.
-- GNU Mailman consultant (installation, migration, customization) Sirius Open Source https://www.siriusopensource.com/ Software systems consulting in Europe, North America, and Japan