Hi @Julian Andres Klode, It seems I didn't read carefully Your additions to the bug description. Especially the line:
"Now run do-release-upgrade --proposed and check that it does not do that." Thanks to @Brian Murray for the note. So, if there is someone still running Ubuntu 17.04 and want to upgrade to 17.10, can open a terminal window and run the command: do-release-upgrade --proposed Just to be clear. Thanks. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1744722 Title: Unknown bad source brings up during 'zesty' to 'artful' upgrade and It break the process To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1744722/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs