Attempting to do-release-upgrade and failed

[Nathan David]

Calculating snap size requirements

Updating repository information
Hit http://us.archive.ubuntu.com/ubuntu mantic InRelease
Hit http://security.ubuntu.com/ubuntu mantic-security InRelease
Hit http://us.archive.ubuntu.com/ubuntu mantic-updates InRelease
Hit http://us.archive.ubuntu.com/ubuntu mantic-backports InRelease
Ign https://download.webmin.com/download/newkey/repository stable InRelease
Hit https://download.webmin.com/download/newkey/repository stable Release
Fetched 0 B in 0s (0 B/s)

Checking package manager
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done

Calculating the changes

Calculating the changes

Could not calculate the upgrade

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.

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'.

Restoring original system state

Aborting
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
=== Command terminated with exit status 1 (Wed Nov 29 19:15:56 2023) ===

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: ubuntu-release-upgrader-core 1:23.04.7
ProcVersionSignature: Ubuntu 6.2.0-37.38-generic 6.2.16
Uname: Linux 6.2.0-37-generic x86_64
ApportVersion: 2.26.1-0ubuntu2.1
Architecture: amd64
CasperMD5CheckResult: pass
CloudArchitecture: x86_64
CloudID: none
CloudName: none
CloudPlatform: none
CloudSubPlatform: config
CrashDB: ubuntu
Date: Wed Nov 29 19:07:33 2023
InstallationDate: Installed on 2023-04-23 (220 days ago)
InstallationMedia: Ubuntu-Server 22.04.2 LTS "Jammy Jellyfish" - Release amd64 (20230217.1)
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to lunar on 2023-11-30 (0 days ago)