package po-debconf 1.0.18 failed to install/upgrade: package is in a very bad inconsistent state; you should reinstall it before attempting configuration

Sorry - no idea

ProblemType: Package
DistroRelease: Ubuntu 15.10
Package: po-debconf 1.0.18
ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
Uname: Linux 4.2.0-18-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
Date: Wed Nov 25 09:07:30 2015
DuplicateSignature: package:po-debconf:1.0.18:package is in a very bad inconsistent state; you should reinstall it before attempting configuration
ErrorMessage: package is in a very bad inconsistent state; you should reinstall it before attempting configuration
InstallationDate: Installed on 2015-10-28 (27 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5
 apt 1.0.10.2ubuntu1
SourcePackage: po-debconf
Title: package po-debconf 1.0.18 failed to install/upgrade: package is in a very bad inconsistent state; you should reinstall it before attempting configuration
UpgradeStatus: No upgrade log present (probably fresh install)