I solved the problem by deleting doubled sources and turning off third party sources during upgrade.
-- Upgrade problem by Feisty Fawn https://bugs.launchpad.net/bugs/102511 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list [EMAIL PROTECTED] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
