package libattr1:amd64 1:2.4.48-5 failed to install/upgrade: package libattr1:amd64 is already installed and configured

[Kristiani Thimo]

Upgrading stuck at installing firefox via snap and I killed the process.

ProblemType: Package
DistroRelease: Ubuntu 22.04
Package: libattr1:amd64 1:2.4.48-5
ProcVersionSignature: Ubuntu 5.15.0-60.66~20.04.1-generic 5.15.78
Uname: Linux 5.15.0-60-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.25
AptdaemonVersion: 1.1.1+bzr982-0ubuntu39
Architecture: amd64
CasperMD5CheckResult: unknown
CrashReports: 640:0:125:692155:2023-03-01 20:28:29.047588348 +0200:2023-03-01 20:28:30.047588348 +0200:/var/crash/libattr1:amd64.0.crash
Date: Wed Mar 1 20:28:30 2023
DuplicateSignature:
 package:libattr1:amd64:1:2.4.48-5
 Preparing to unpack .../122-libpcre2-16-0_10.39-3ubuntu0.1_amd64.deb ...
 dpkg: error processing package libattr1:amd64 (--configure):
  package libattr1:amd64 is already installed and configured
ErrorMessage: package libattr1:amd64 is already installed and configured
InstallationDate: Installed on 2023-02-28 (0 days ago)
InstallationMedia: Ubuntu 20.04.5 LTS "Focal Fossa" - Release amd64 (20220831)
Python3Details: /usr/bin/python3.10, Python 3.10.6, python3-minimal, 3.10.6-1~22.04
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.21.1ubuntu2.1
 apt 2.4.8
SourcePackage: dpkg
Title: package libattr1:amd64 1:2.4.48-5 failed to install/upgrade: package libattr1:amd64 is already installed and configured
UpgradeStatus: Upgraded to jammy on 2023-03-01 (0 days ago)

[Julian Andres Klode (juliank)]

This system is in an unsupported state between 20.04 and 22.04, as evidenced by the submitted log file containing

Unpacking language-pack-en (1:22.04+20230209) over (1:20.04+20220818) ...

It seems a release upgrade has been started but not completed.

And I'll ignore the firefox snap stuck bit in the bug report message because that's not what the crash is about.