package drupal7 (not installed) failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1

[Chandrashekhar Kumar]

This error came while upgrading to distro 16.04 LTS

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: drupal7 (not installed)
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
Date: Sat Apr 30 13:23:36 2016
ErrorMessage: subprocess installed pre-removal script returned error exit status 1
InstallationDate: Installed on 2015-08-24 (249 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1
 apt 1.2.10ubuntu1
SourcePackage: drupal7
Title: package drupal7 (not installed) failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)