package edubuntu-artwork 15.12.1 failed to install/upgrade: installed edubuntu-artwork package post-removal script subprocess returned error exit status 127

[Jim Patterson]

Unable to delete offending package, or to complete upgrades.

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: edubuntu-artwork 15.12.1
ProcVersionSignature: Ubuntu 5.15.0-46.49~20.04.1-generic 5.15.39
Uname: Linux 5.15.0-46-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
CasperMD5CheckResult: skip
Date: Tue Aug 23 09:47:10 2022
DpkgTerminalLog:
 Removing edubuntu-artwork (15.12.1) ...
 /var/lib/dpkg/info/edubuntu-artwork.postrm: 31: update-gconf-defaults: not found
 dpkg: error processing package edubuntu-artwork (--remove):
  installed edubuntu-artwork package post-removal script subprocess returned error exit status 127
 dpkg: too many errors, stopping
DuplicateSignature:
 package:edubuntu-artwork:15.12.1
 Removing edubuntu-artwork (15.12.1) ...
 /var/lib/dpkg/info/edubuntu-artwork.postrm: 31: update-gconf-defaults: not found
 dpkg: error processing package edubuntu-artwork (--remove):
  installed edubuntu-artwork package post-removal script subprocess returned error exit status 127
ErrorMessage: installed edubuntu-artwork package post-removal script subprocess returned error exit status 127
InstallationDate: Installed on 2022-03-05 (170 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
Python3Details: /usr/bin/python3.8, Python 3.8.10, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3.2
 apt 2.0.9
SourcePackage: edubuntu-artwork
Title: package edubuntu-artwork 15.12.1 failed to install/upgrade: installed edubuntu-artwork package post-removal script subprocess returned error exit status 127
UpgradeStatus: Upgraded to focal on 2022-08-23 (0 days ago)