package libpostproc52 6:0.git20120821-4 failed to install/upgrade: libpostproc52:amd64 6:0.git20120821-4 (Multi-Arch: no) non è co-installabile con libpostproc52 che ha molteplici istanze installate

conflict between libpostproc52_6%3a0.8.13-0ubuntu0.13.10.1_amd64.deb and libpostproc52_6%3a0.git20120821-4_amd64.deb

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: libpostproc52 6:0.git20120821-4
ProcVersionSignature: Ubuntu 3.11.0-26.45-generic 3.11.10.12
Uname: Linux 3.11.0-26-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.3
Architecture: amd64
Date: Mon Aug 25 20:00:18 2014
Dependencies:
 gcc-4.9-base 4.9-20140406-0ubuntu1
 libc6 2.19-0ubuntu6.1
 libgcc1 1:4.9-20140406-0ubuntu1
 multiarch-support 2.19-0ubuntu6.1
DuplicateSignature: package:libpostproc52:6:0.git20120821-4:libpostproc52:amd64 6:0.git20120821-4 (Multi-Arch: no) non è co-installabile con libpostproc52 che ha molteplici istanze installate
ErrorMessage: libpostproc52:amd64 6:0.git20120821-4 (Multi-Arch: no) non è co-installabile con libpostproc52 che ha molteplici istanze installate
InstallationDate: Installed on 2013-05-10 (471 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
SourcePackage: libpostproc
Title: package libpostproc52 6:0.git20120821-4 failed to install/upgrade: libpostproc52:amd64 6:0.git20120821-4 (Multi-Arch: no) non è co-installabile con libpostproc52 che ha molteplici istanze installate
UpgradeStatus: Upgraded to trusty on 2014-08-24 (0 days ago)