package pgbouncer 1.4.2-2build1 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 2

[Anuj]

I was on ubuntu 12.04 and trying to upgrade to 12.10 using update manager.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: pgbouncer 1.4.2-2build1
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic-pae 3.2.14
Uname: Linux 3.2.0-23-generic-pae i686
ApportVersion: 2.0.1-0ubuntu15.1
Architecture: i386
Date: Wed May 8 21:27:57 2013
DpkgTerminalLog:
 Removing pgbouncer ...
 pgbouncer not running
 invoke-rc.d: initscript pgbouncer, action "stop" failed.
 dpkg: error processing pgbouncer (--remove):
  subprocess installed pre-removal script returned error exit status 2
ErrorMessage: subprocess installed pre-removal script returned error exit status 2
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
MarkForUpload: True
SourcePackage: pgbouncer
Title: package pgbouncer 1.4.2-2build1 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 2
UpgradeStatus: Upgraded to precise on 2013-05-08 (0 days ago)
modified.conffile..etc.init.d.pgbouncer: [modified]
mtime.conffile..etc.init.d.pgbouncer: 2012-10-01T15:38:32.539886