package postgresql-8.4 8.4.17-0ubuntu12.04 failed to install/upgrade: subprocess new pre-removal script returned error exit status 1

[José Luis Solano Ospino]

I don know

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: postgresql-8.4 8.4.17-0ubuntu12.04
ProcVersionSignature: Ubuntu 3.2.0-56.86-generic 3.2.51
Uname: Linux 3.2.0-56-generic i686
NonfreeKernelModules: wl
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: i386
Date: Fri Nov 29 08:34:12 2013
DuplicateSignature: package:postgresql-8.4:8.4.17-0ubuntu12.04:subprocess new pre-removal script returned error exit status 1
ErrorMessage: subprocess new pre-removal script returned error exit status 1
MarkForUpload: True
SourcePackage: postgresql-8.4
Title: package postgresql-8.4 8.4.17-0ubuntu12.04 failed to install/upgrade: subprocess new pre-removal script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)