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The package tools upgrade to the latest package available in your sources, so if you provide non-Ubuntu sources that have packages of higher versions, they'll replace your Ubuntu packages and result if your system no longer being a Ubuntu one. This is expected behavior, and not a bug. I see many Kali packages being installed on your system, which a Ubuntu system cannot do unless a user with `sudo` permissions added Kali repositories to the system sources. I do not believe this is a bug, but the Debian package tools working as intended, and you have a support problem because of polluted sources introduced on to your system. As such I've changed the status of this bug to Incomplete. If you believe I'm in error, or have new information as to why it's a bug, please leave a comment explaining why, and change the status back to "New". For Ubuntu Support sites, try https://answers.launchpad.net/ubuntu. You can also find help with your problem in the support forum of your local Ubuntu community http://loco.ubuntu.com/ or asking at https://askubuntu.com or https://ubuntuforums.org, or for more support options please look at https://discourse.ubuntu.com/t/community- support/709 ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890200 Title: ubuntu desktop changed to kali To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1890200/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs