package redmine 3.4.4-1 failed to install/upgrade: installed redmine package post-installation script subprocess returned error exit status 1

Issue raised when i am upgrading from 16.04 to 18.04

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: redmine 3.4.4-1
ProcVersionSignature: Ubuntu 4.4.0-133.159-generic 4.4.134
Uname: Linux 4.4.0-133-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
Date: Sat Aug 18 14:13:01 2018
ErrorMessage: installed redmine package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2015-10-10 (1042 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3ubuntu1
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.3
SourcePackage: redmine
Title: package redmine 3.4.4-1 failed to install/upgrade: installed redmine package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to bionic on 2018-08-18 (0 days ago)