package dpkg 1.18.4ubuntu1.6 failed to install/upgrade: package dpkg is already installed and configured

[Stefan Friedl]

internal error was reported. installation was canceled.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: dpkg 1.18.4ubuntu1.6
ProcVersionSignature: Ubuntu 4.10.0-28.32~16.04.2-generic 4.10.17
Uname: Linux 4.10.0-28-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
CrashReports: 600:0:117:349298:2019-12-01 19:44:48.425077199 +0100:2019-12-01 19:44:49.425077199 +0100:/var/crash/dpkg.0.crash
Date: Sun Dec 1 19:44:49 2019
DpkgTerminalLog:
 dpkg: error processing package dpkg (--configure):
  package dpkg is already installed and configured
ErrorMessage: package dpkg is already installed and configured
InstallationDate: Installed on 2019-12-01 (0 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.6
 apt 1.2.24
SourcePackage: dpkg
Title: package dpkg 1.18.4ubuntu1.6 failed to install/upgrade: package dpkg is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)