Seems they identified the issue causing the upgrade to fail: https://support.plesk.com/hc/en-us/articles/115003430813#_=_
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1725222 Title: do-release-upgrade from Ubuntu 14.04 to 16.04.1 performs unsupported upgrade from MySQL 5.5 to 5.7 To manage notifications about this bug go to: https://bugs.launchpad.net/serverguide/+bug/1725222/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs