package 389-ds-base 1.3.4.9-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

Following a pop up about an error that occurred during ubuntu 16.04 upgrade

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: 389-ds-base 1.3.4.9-1
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Sat Aug 13 16:05:33 2016
DuplicateSignature:
 package:389-ds-base:1.3.4.9-1
 Installing new version of config file /etc/dirsrv/schema/99user.ldif ...
 dpkg: error processing package 389-ds-base (--configure):
  subprocess installed post-installation script returned error exit status 2
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationDate: Installed on 2013-09-07 (1071 days ago)
InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.12~ubuntu16.04.1
SourcePackage: 389-ds-base
Title: package 389-ds-base 1.3.4.9-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: Upgraded to xenial on 2016-08-13 (0 days ago)