Update from 21.04 to 21.10

[Holger Urbanek]

update-manager results in a error message
"Es konnte nicht ermittelt werden, welche Systemaktualisierungen verfügbar sind

Ein unlösbares Problem trat während der Berechnung der Systemaktualisierung auf.

 Wenn keine dieser zutrifft, melden Sie bitte den Fehler mithilfe des Befehls 'ubuntu-bug ubuntu-release-upgrader-core' in einem Terminal. Wenn Sie dies selbst untersuchen möchten, finden Sie in den Protokolldateien unter »/var/log/dist-upgrade« Details zur Systemaktualisierung. Schauen Sie sich insbesondere »main.log« und »apt.log« an."

So, there am I ...

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: ubuntu-release-upgrader-core 1:21.04.17
ProcVersionSignature: Ubuntu 5.11.0-46.51-generic 5.11.22
Uname: Linux 5.11.0-46-generic x86_64
ApportVersion: 2.20.11-0ubuntu65.4
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
Date: Tue Jan 11 11:13:28 2022
InstallationDate: Installed on 2020-12-08 (399 days ago)
InstallationMedia: Ubuntu-MATE 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=de_DE
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to hirsute on 2022-01-11 (0 days ago)
VarLogDistupgradeTermlog:

[Brian Murray (brian-murray)]

You have multiple meta release packages installed and their dependencies are causing the release upgrader to fail to calculate the upgrade path. Please choose to either have the ubuntu-mate or xubuntu metapackages installed. From VarLogDistUpgradeMain.log:

2022-01-11 11:11:01,757 DEBUG MetaPkgs: ubuntu-mate-core ubuntu-mate-desktop xubuntu-core xubuntu-desktop

[Holger Urbanek (holgerurb)]

Thanks.
After removing all mate-related packages the updater was able to update flawlessly.
Thanks again.

[Launchpad Janitor (janitor)]

[Expired for ubuntu-release-upgrader (Ubuntu) because there has been no activity for 60 days.]