I tested the version of ubuntu-release-upgrader-core from bionic- proposed and received the new error message regarding prompt being set to never.
bdmurray@clean-bionic-amd64:~$ tail -n1 /etc/update-manager/release-upgrades Prompt=never bdmurray@clean-bionic-amd64:~$ do-release-upgrade Checking for a new Ubuntu release In /etc/update-manager/release-upgrades Prompt is set to never so upgrading is not possible. bdmurray@clean-bionic-amd64:~$ apt-cache policy ubuntu-release-upgrader-core ubuntu-release-upgrader-core: Installed: 1:18.04.30 Candidate: 1:18.04.30 ** Tags removed: verification-needed-bionic ** Tags added: verification-done-bionic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1795024 Title: setting release-upgrades Prompt to never can cause confusing behavior To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1795024/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs