You have PostgreSQL 12 installed. This version is no longer available after 20.04 (!) and it must now be removed, however this can incur data loss so for safety reasons we don't do that, so go take a backup of your database, remove postgresql-12, upgrade and then restore your backup into whatever version of postgresql is in 24.04.
** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2078651 Title: error upgrade from 22.04 to 24.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2078651/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs