package libva1 1.6.0-1 failed to install/upgrade: trying to overwrite shared '/usr/share/doc/libva1/changelog.Debian.gz', which is different from other instances of package libva1:amd64

[victor]

Eu não consigo fazer upgrade :(

ProblemType: Package
DistroRelease: Ubuntu 15.10
Package: libva1 1.6.0-1
ProcVersionSignature: Ubuntu 3.19.0-33.38-generic 3.19.8-ckt7
Uname: Linux 3.19.0-33-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.8
Architecture: amd64
Date: Thu Nov 26 17:37:12 2015
DuplicateSignature: package:libva1:1.6.0-1:trying to overwrite shared '/usr/share/doc/libva1/changelog.Debian.gz', which is different from other instances of package libva1:amd64
ErrorMessage: trying to overwrite shared '/usr/share/doc/libva1/changelog.Debian.gz', which is different from other instances of package libva1:amd64
InstallationDate: Installed on 2015-09-11 (75 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5.1
 apt 1.0.9.7ubuntu4.2
SourcePackage: libva
Title: package libva1 1.6.0-1 failed to install/upgrade: trying to overwrite shared '/usr/share/doc/libva1/changelog.Debian.gz', which is different from other instances of package libva1:amd64
UpgradeStatus: Upgraded to wily on 2015-11-22 (4 days ago)