Could not calculate the upgrade

[Alireza Farahani]

When I perform do-release-upgrade I face the "Could not calculate the upgrade" error. There are multiple broken packages in apt.log which I think are the cause, but I don't know if it's safe to remove them.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.39
ProcVersionSignature: Ubuntu 5.4.0-137.154-generic 5.4.218
Uname: Linux 5.4.0-137-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.25
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Mon Jan 30 11:15:56 2023
InstallationDate: Installed on 2018-10-11 (1572 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to focal on 2023-01-30 (0 days ago)

[Nick Rosbrook (enr0n)]

Reviewing the files from your upgrade attempt, you have installed pipewire packages from the pipewire-debian/pipewire-upstream PPA. Some of the packages installed are newer than those in the official archive, which is keeping some pipewire-related packages installed which then prevents the upgrade from being calculated. Please try using the ppa-purge tool to remove packages installed from ppa:pipewire-debian/pipewire-upstream by running ppa-purge -s ppa.launchpad.net -o pipewire-debian -p pipewire-upstream. After that you can try upgrading again and if it still fails open a new bug report. Thanks and good luck!