This was solved for me by doing `apt full-upgrade`. `man apt` describes:
`upgrade is used to install available upgrades of all packages currently installed on the system from the, but existing packages will never be removed. If an upgrade for a package requires the remove of an installed package the upgrade for this package isn't performed.` -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gsettings-desktop-schemas in Ubuntu. https://bugs.launchpad.net/bugs/1891165 Title: gsettings-desktop-schemas : Breaks: mutter (< 3.31.4) but 3.28.4-0ubuntu18.04.2 is to be installed Status in gsettings-desktop-schemas package in Ubuntu: Confirmed Bug description: I was about to upgrade ubuntu 18 to ubuntu 20, but it says “Your python3 install is corrupted. Please fix the '/usr/bin/python3'”, So i tried to run sudo ln -sf /usr/bin/python2.7 /usr/bin/python as suggested in https://askubuntu.com/questions/1185813/how-to-fix-ubuntu-19-04-cannot-upgrade-to-19-10-error-your-python3-install-is. But i got more errors The following packages have unmet dependencies: gsettings-desktop-schemas : Breaks: mutter (< 3.31.4) but 3.28.4-0ubuntu18.04.2 is to be installed libgirepository-1.0-1 : Breaks: python-gi (< 3.34.0-4~) but 3.26.1-2ubuntu1 is to be installed E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages. sudo ln -sf /usr/bin/python2.7 /usr/bin/python ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: mutter 3.28.4-0ubuntu18.04.2 ProcVersionSignature: Ubuntu 5.4.0-42.46~18.04.1-generic 5.4.44 Uname: Linux 5.4.0-42-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.16 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Tue Aug 11 20:38:08 2020 InstallationDate: Installed on 2020-02-08 (184 days ago) InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805) SourcePackage: mutter UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gsettings-desktop-schemas/+bug/1891165/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
