package postgresql-common 169git1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

installing through a script in ajenti

ProblemType: Package
DistroRelease: Ubuntu 15.10
Package: postgresql-common 169git1
ProcVersionSignature: Ubuntu 4.2.0-25.30-generic 4.2.6
Uname: Linux 4.2.0-25-generic i686
ApportVersion: 2.19.1-0ubuntu5
Architecture: i386
Date: Sat Jan 23 11:44:15 2016
DuplicateSignature: package:postgresql-common:169git1:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2016-01-16 (6 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release i386 (20151021)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5.1
 apt 1.0.10.2ubuntu1
SourcePackage: postgresql-common
Title: package postgresql-common 169git1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)