package zentyal-users (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 2

[Ricardo Cortes]

package zentyal-users (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 2

ProblemType: Package
DistroRelease: Ubuntu 13.04
Package: zentyal-users (not installed)
ProcVersionSignature: Ubuntu 3.8.0-25.37-generic 3.8.13
Uname: Linux 3.8.0-25-generic i686
ApportVersion: 2.9.2-0ubuntu8.1
Architecture: i386
Date: Thu Jun 13 00:18:52 2013
DpkgTerminalLog:
 Removing zentyal-users ...
 Purging configuration files for zentyal-users ...
 dpkg: error processing zentyal-users (--purge):
  subprocess installed post-removal script returned error exit status 2
DuplicateSignature: package:zentyal-users:(not installed):subprocess installed post-removal script returned error exit status 2
ErrorMessage: subprocess installed post-removal script returned error exit status 2
InstallationDate: Installed on 2013-06-09 (4 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha i386 (20130202)
MarkForUpload: True
SourcePackage: zentyal-users
Title: package zentyal-users (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)