Ubuntu upgrade failed

[Garnet Merrill]

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'.

ProblemType: Bug
DistroRelease: Ubuntu 23.10
Package: ubuntu-release-upgrader-core 1:23.10.14
ProcVersionSignature: Ubuntu 6.5.0-41.41-generic 6.5.13
Uname: Linux 6.5.0-41-generic x86_64
ApportVersion: 2.27.0-0ubuntu5
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CrashReports:
 640:0:122:5581009:2024-06-09 10:29:05.604440688 -0400:2024-06-09 10:29:05.700425478 -0400:/var/crash/_usr_lib_systemd_systemd-journald.0.crash
 644:0:122:0:2024-06-09 10:29:05.604440688 -0400:2024-06-09 10:29:05.604440688 -0400:/var/crash/_usr_lib_systemd_systemd-journald.0.upload
 600:113:122:37:2024-06-09 10:29:06.792254376 -0400:2024-06-09 10:29:06.792254376 -0400:/var/crash/_usr_lib_systemd_systemd-journald.0.uploaded
CurrentDesktop: GNOME
Date: Tue Jun 11 08:05:03 2024
InstallationDate: Installed on 2017-09-19 (2457 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/usr/bin/zsh
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to mantic on 2024-06-11 (0 days ago)
VarLogDistupgradeTermlog: