I was able to resolve this issue for now by copying the previous package version from another machine:
update-manager-core_1%3a0.87.18_amd64.deb Once I downgraded update-manager-core with this package, I was able to reinstall ubuntu-desktop, update-manager and update-notifier. -- Partial update removes existing packages without checking/installing replacements https://bugs.launchpad.net/bugs/219444 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
