This should not just be closed because Zesty has become end of life, this sounds like a real bug and the update-manager code around snapshots has not changed at all recently.
** Changed in: update-manager (Ubuntu) Status: Invalid => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1732026 Title: update-manager creates duplicate snapper "pre" snapshots To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1732026/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs