package base-files 6.5ubuntu6 failed to install/upgrade: base-files:i386 6.5ubuntu6 (Multi-Arch

AMD64 installation on x32

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: base-files 6.5ubuntu6
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Wed May 9 22:47:55 2012
Dependencies:

DpkgHistoryLog:
 Start-Date: 2012-05-09 22:47:03
 Commandline: aptdaemon role='role-install-file' sender=':1.90'
 Install: base-files:i386 (6.5ubuntu6, automatic), libtinfo5:i386 (5.9-4, automatic), gcc-4.6-base:i386 (4.6.3-1ubuntu5, automatic), bash:i386 (4.2-2ubuntu2, automatic), original-awk:i386 (2011-08-10-1, automatic), dash:i386 (0.5.7-2ubuntu2, automatic), libgcc1:i386 (4.6.3-1ubuntu5, automatic), libxcb1:i386 (1.8.1-1, automatic), libxau6:i386 (1.0.6-4, automatic), libxdmcp6:i386 (1.1.0-4, automatic), libasound2:i386 (1.0.25-1ubuntu10, automatic), zlib1g:i386 (1.2.3.4.dfsg-3ubuntu4, automatic), libx11-6:i386 (1.4.99.1-0ubuntu2, automatic), libc6:i386 (2.15-0ubuntu10, automatic), libxext6:i386 (1.3.0-3build1, automatic)
DuplicateSignature:
 Setting up original-awk:i386 (2011-08-10-1) ...
 Selecting previously unselected package base-files:i386.
 dpkg: error processing /var/cache/apt/archives/base-files_6.5ubuntu6_i386.deb (--unpack):
  base-files:i386 6.5ubuntu6 (Multi-Arch: no) is not co-installable with base-files:amd64 6.5ubuntu6 (Multi-Arch: no) which is currently installed
ErrorMessage: base-files:i386 6.5ubuntu6 (Multi-Arch
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
SourcePackage: base-files
Title: package base-files 6.5ubuntu6 failed to install/upgrade: base-files:i386 6.5ubuntu6 (Multi-Arch
UpgradeStatus: Upgraded to precise on 2012-05-09 (0 days ago)