package perl-base 5.26.0-8ubuntu1 failed to install/upgrade: package perl-base is already installed and configured

[Lyn Perrine]

I was upgrading from 17.04 to 17.10 when this happened.

ProblemType: Package
DistroRelease: Ubuntu 17.10
Package: perl-base 5.26.0-8ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3
AptdaemonVersion: 1.1.1+bzr982-0ubuntu17
Architecture: amd64
Date: Mon Oct 23 17:18:08 2017
DuplicateSignature:
 package:perl-base:5.26.0-8ubuntu1
 Unpacking libxml-parser-perl (2.44-2build3) over (2.44-2build2) ...
 dpkg: error processing package perl-base (--configure):
  package perl-base is already installed and configured
ErrorMessage: package perl-base is already installed and configured
InstallationDate: Installed on 2017-03-31 (207 days ago)
InstallationMedia: Lubuntu 17.04 "Zesty Zapus" - Beta amd64 (20170331)
Python3Details: /usr/bin/python3.6, Python 3.6.3, python3-minimal, 3.6.3-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.14, python-minimal, 2.7.14-2ubuntu1
RelatedPackageVersions:
 dpkg 1.18.24ubuntu1
 apt 1.5
SourcePackage: dpkg
Title: package perl-base 5.26.0-8ubuntu1 failed to install/upgrade: package perl-base is already installed and configured
UpgradeStatus: Upgraded to artful on 2017-10-24 (1 days ago)

[dino99 (9d9)]

you should not see that false positive error with that release; clean your system to purge some old packages/settings.