package logcheck 1.3.17 failed to install/upgrade: subprocess installed post-installation script returned error exit status 6

no group logcheck in usermod

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: logcheck 1.3.17
ProcVersionSignature: Ubuntu 4.4.0-83.106-generic 4.4.70
Uname: Linux 4.4.0-83-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.9
Architecture: amd64
Date: Sun Jul 16 03:11:20 2017
ErrorMessage: subprocess installed post-installation script returned error exit status 6
InstallationDate: Installed on 2017-07-13 (2 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.20
SourcePackage: logcheck
Title: package logcheck 1.3.17 failed to install/upgrade: subprocess installed post-installation script returned error exit status 6
UpgradeStatus: No upgrade log present (probably fresh install)