[MM3-users] Trouble importing a Mailman 3 Postgres database into a new Mailman 3 instance (Docker)

skenny@scss.tcd.ie writes:

But deleting and then creating a new blank mailmandb database just prior to importing ... it can't be the right thing to do.

If you're using containers, then you're using a system that should be turnkey for the *Mailman* admin, who isn't necessarily the *database* admin. So the database is going to be already populated to some extent. That will cause conflicts when you import a database dump, because the dump expects a blank slate. AFAICS (I haven't done it, so this is just theory) this *is* the right thing to do: blank out the database so the import just works.

Does the installation work when you do it this way? If not, what is the problem?