package libncurses5-dev 5.9-4 failed to install/upgrade: libncurses5-dev:i386 5.9-4 (Multi-Arch

[DJ Nourse]

I was upgrading from 11.04 to 12

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: libncurses5-dev 5.9-4
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic x86_64
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
Date: Thu Aug 16 20:56:19 2012
DpkgTerminalLog:
 dpkg: error processing /var/cache/apt/archives/libncurses5-dev_5.9-4_i386.deb (--unpack):
  libncurses5-dev:i386 5.9-4 (Multi-Arch: no) is not co-installable with libncurses5-dev:amd64 5.9-4 (Multi-Arch: no) which is currently installed
ErrorMessage: libncurses5-dev:i386 5.9-4 (Multi-Arch
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: ncurses
Title: package libncurses5-dev 5.9-4 failed to install/upgrade: libncurses5-dev:i386 5.9-4 (Multi-Arch
UpgradeStatus: Upgraded to precise on 2012-08-17 (0 days ago)