[Bug 2002340] VarLogDistupgradeLspcitxt.txt

[Ravi]

apport information

** Attachment added: "VarLogDistupgradeLspcitxt.txt"
   https://bugs.launchpad.net/bugs/2002340/+attachment/5641522/+files/VarLogDistupgradeLspcitxt.txt

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https://bugs.launchpad.net/bugs/2002340

Title:
  Cannot upgrade from focal to jellyfish

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

Bug description:
  When running 
  $ sudo do-release-upgrade -d
  get this error
  Calculating the changes

  Could not calculate the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  This was caused by: 
  * Upgrading to a pre-release version of Ubuntu 
  This is most likely a transient problem, 
  please try again later. 
  If none of this applies, then please report this bug using the 
  command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If 
  you want to investigate this yourself the log files in 
  '/var/log/dist-upgrade' will contain details about the upgrade. 
  Specifically, look at 'main.log' and 'apt.log'.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.39
  ProcVersionSignature: Ubuntu 5.4.0-136.153-generic 5.4.218
  Uname: Linux 5.4.0-136-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.25
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  CurrentDesktop: GNOME-Flashback:GNOME
  Date: Mon Jan  9 13:13:29 2023
  InstallationDate: Installed on 2017-02-15 (2154 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2023-01-09 (0 days ago)
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu27.25
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  CurrentDesktop: GNOME-Flashback:GNOME
  DistroRelease: Ubuntu 20.04
  InstallationDate: Installed on 2017-02-15 (2160 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  Package: ubuntu-release-upgrader (not installed)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 5.4.0-137.154-generic 5.4.218
  Tags:  focal dist-upgrade
  Uname: Linux 5.4.0-137-generic x86_64
  UpgradeStatus: Upgraded to focal on 2023-01-16 (0 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo users
  _MarkForUpload: True

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