package postgresql-9.4 9.4~beta2-1build1 failed to install/upgrade: o subproceso novo script de pre-installation devolveu o estado de saída de erro 1

[Xosé]

Apareceron erros ao procesar:
 /var/cache/apt/archives/postgresql-9.4_9.4~beta3-2_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Package
DistroRelease: Ubuntu 14.10
Package: postgresql-9.4 9.4~beta2-1build1
ProcVersionSignature: Ubuntu 3.5.0-52.78~precise1-generic 3.5.7.33
Uname: Linux 3.5.0-52-generic i686
ApportVersion: 2.14.7-0ubuntu7
Architecture: i386
Date: Fri Oct 17 10:41:09 2014
DuplicateSignature: package:postgresql-9.4:9.4~beta2-1build1:o subproceso novo script de pre-installation devolveu o estado de saída de erro 1
ErrorMessage: o subproceso novo script de pre-installation devolveu o estado de saída de erro 1
InstallationDate: Installed on 2013-03-15 (580 days ago)
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130213)
SourcePackage: postgresql-9.4
Title: package postgresql-9.4 9.4~beta2-1build1 failed to install/upgrade: o subproceso novo script de pre-installation devolveu o estado de saída de erro 1
UpgradeStatus: No upgrade log present (probably fresh install)