package libelf1 0.158-0ubuntu5.1 [modified: usr/share/doc/libelf1/changelog.Debian.gz] failed to install/upgrade: trying to overwrite shared '/usr/share/doc/libelf1/changelog.Debian.gz', which is different from other instances of package libelf1:i386

[zahra]

after update ubuntu 14.04, terminal error like this:
Duplicate sources.list entry http://archive.canonical.com/ubuntu/ trusty/partner amd64 Packages (/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_trusty_partner_binary-amd64_Packages)

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: libelf1 0.158-0ubuntu5.1 [modified: usr/share/doc/libelf1/changelog.Debian.gz]
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
Date: Tue Oct 14 21:16:21 2014
Dependencies:
 gcc-4.9-base 4.9-20140406-0ubuntu1
 libc6 2.19-0ubuntu6
 libgcc1 1:4.9-20140406-0ubuntu1
 multiarch-support 2.19-0ubuntu6
DpkgTerminalLog:
 Preparing to unpack .../libelf1_0.158-0ubuntu5.1_i386.deb ...
 Unpacking libelf1:i386 (0.158-0ubuntu5.1) over (0.158-0ubuntu5) ...
 dpkg: error processing archive /var/cache/apt/archives/libelf1_0.158-0ubuntu5.1_i386.deb (--unpack):
  trying to overwrite shared '/usr/share/doc/libelf1/changelog.Debian.gz', which is different from other instances of package libelf1:i386
DuplicateSignature: package:libelf1:0.158-0ubuntu5.1 [modified: usr/share/doc/libelf1/changelog.Debian.gz]:trying to overwrite shared '/usr/share/doc/libelf1/changelog.Debian.gz', which is different from other instances of package libelf1:i386
ErrorMessage: trying to overwrite shared '/usr/share/doc/libelf1/changelog.Debian.gz', which is different from other instances of package libelf1:i386
InstallationDate: Installed on 2014-10-14 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: elfutils
Title: package libelf1 0.158-0ubuntu5.1 [modified: usr/share/doc/libelf1/changelog.Debian.gz] failed to install/upgrade: trying to overwrite shared '/usr/share/doc/libelf1/changelog.Debian.gz', which is different from other instances of package libelf1:i386
UpgradeStatus: No upgrade log present (probably fresh install)