[Bug 2000651] [NEW] broken-packages-error while upgrading ubuntu from 20.04 to 22.04

[Tofu Einfall]

Public bug reported:

sudo apt-get update and sudo apt-get upgrade runs totally fine, nothing
wrong came out, just by running sudo do-release-upgrade the error came
out:

An unresolvable problem occurred while calculating the upgrade.

This was likely caused by: 
* Unofficial software packages not provided by Ubuntu 
Please use the tool 'ppa-purge' from the ppa-purge 
package to remove software from a Launchpad PPA and 
try the upgrade again. 

although i've deleted all ppa files, still not working. I'm wondering if
it could be the problem with pyhont3.10, i also installed it but not my
default python3 version(default is python3.8), cuz in apt.log it shows:

Reinst Failed early because of libpython3.10-stdlib:amd64

several times.

Many thanks in advance~

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.39
ProcVersionSignature: Ubuntu 5.15.0-56.62~20.04.1-generic 5.15.64
Uname: Linux 5.15.0-56-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.25
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Wed Dec 28 22:13:12 2022
InstallationDate: Installed on 2021-10-24 (430 days ago)
InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to focal on 2022-12-28 (0 days ago)

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade focal

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https://bugs.launchpad.net/bugs/2000651

Title:
  broken-packages-error while upgrading ubuntu from 20.04 to 22.04

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  sudo apt-get update and sudo apt-get upgrade runs totally fine,
  nothing wrong came out, just by running sudo do-release-upgrade the
  error came out:

  An unresolvable problem occurred while calculating the upgrade.

  This was likely caused by: 
  * Unofficial software packages not provided by Ubuntu 
  Please use the tool 'ppa-purge' from the ppa-purge 
  package to remove software from a Launchpad PPA and 
  try the upgrade again. 

  although i've deleted all ppa files, still not working. I'm wondering
  if it could be the problem with pyhont3.10, i also installed it but
  not my default python3 version(default is python3.8), cuz in apt.log
  it shows:

  Reinst Failed early because of libpython3.10-stdlib:amd64

  several times.

  Many thanks in advance~

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.39
  ProcVersionSignature: Ubuntu 5.15.0-56.62~20.04.1-generic 5.15.64
  Uname: Linux 5.15.0-56-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.25
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Dec 28 22:13:12 2022
  InstallationDate: Installed on 2021-10-24 (430 days ago)
  InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2022-12-28 (0 days ago)

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