update 18.04 to 20.04 crashes WARNING Can't mark 'ubuntu-desktop' for upgrade

[Yadykin Andrey]

main.log
2020-09-25 20:43:22,552 DEBUG Comparing 5.4.0-49 with 5.4.0-48
2020-09-25 20:43:22,761 INFO installing linux metapackage: linux-generic
2020-09-25 20:43:22,761 DEBUG Installing 'linux-generic' (linux metapackage may have been accidentally uninstalled)
2020-09-25 20:43:22,787 DEBUG Marking 'ubuntu-desktop' for upgrade
2020-09-25 20:43:22,915 WARNING Can't mark 'ubuntu-desktop' for upgrade (E:Невозможно исправить ошибки: у вас зафиксированы сломанные пакеты.)
apt.log
Broken gnome-control-center:amd64 Зависит on colord:amd64 < 1.3.3-2build1 | 1.4.4-2 @ii umR > (>= 0.1.30)
  Considering colord:amd64 37 as a solution to gnome-control-center:amd64 22
  MarkKeep gnome-control-center:amd64 < 1:3.28.2-0ubuntu0.18.04.6 -> 1:3.36.4-0ubuntu1 @ii umU Ib > FU=0
    Reinst Failed because of colord:amd64
  MarkKeep gnome-control-center:amd64 < 1:3.28.2-0ubuntu0.18.04.6 -> 1:3.36.4-0ubuntu1 @ii umU Ib > FU=0
  Removing gnome-control-center:amd64 rather than change colord:amd64
  MarkDelete gnome-control-center:amd64 < 1:3.28.2-0ubuntu0.18.04.6 | 1:3.36.4-0ubuntu1 @ii umH Ib > FU=0
Investigating (9) ubuntu-desktop-minimal:amd64 < none -> 1.450.2 @un umN Ib >
Broken ubuntu-desktop-minimal:amd64 Зависит on gnome-control-center:amd64 < 1:3.28.2-0ubuntu0.18.04.6 | 1:3.36.4-0ubuntu1 @ii umR >
  Considering gnome-control-center:amd64 37 as a solution to ubuntu-desktop-minimal:amd64 0
  MarkKeep ubuntu-desktop-minimal:amd64 < none -> 1.450.2 @un umN Ib > FU=0
  Holding Back ubuntu-desktop-minimal:amd64 rather than change gnome-control-center:amd64
Done

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.39
ProcVersionSignature: Ubuntu 5.4.0-49.53~18.04.1-generic 5.4.65
Uname: Linux 5.4.0-49-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.17
Architecture: amd64
CrashDB: ubuntu
Date: Fri Sep 25 20:27:50 2020
InstallationDate: Installed on 2020-03-30 (178 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-09-25 (0 days ago)
VarLogDistupgradeTermlog:

mtime.conffile..etc.update-manager.release-upgrades: 2020-08-28T21:31:15.301201

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Brian Murray (brian-murray)]

Reviewing the files from your upgrade attempt you seem to have enabled a PPA that provides Xorg packages. This will prevent the upgrade as that PPA contains package version numbers greater than the release to which you are upgrading. You can revert the PPA by installing the ppa-purge package from the official Ubuntu archive and then running 'sudo ppa-purge ppa:kisak/kisak-mesa'. After that you can try upgrading again and if it still fails open a new bug report. Thanks and good luck!