package python3-distupgrade 1:0.165 failed to install/upgrade: trying to overwrite '/usr/lib/python3/dist-packages/DistUpgrade/__init__.py', which is also in package python3-update-manager 1:0.164

This has just stared popping up all the time

ProblemType: Package
DistroRelease: Ubuntu 12.10
Package: python3-distupgrade 1:0.165
ProcVersionSignature: Ubuntu 3.5.0-3.3-generic 3.5.0-rc5
Uname: Linux 3.5.0-3-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.2.5-0ubuntu2
Architecture: amd64
Date: Tue Jul 3 10:24:32 2012
DuplicateSignature:
 Unpacking python3-distupgrade (from .../python3-distupgrade_1%3a0.165_all.deb) ...
 dpkg: error processing /var/cache/apt/archives/python3-distupgrade_1%3a0.165_all.deb (--unpack):
  trying to overwrite '/usr/lib/python3/dist-packages/DistUpgrade/__init__.py', which is also in package python3-update-manager 1:0.164
ErrorMessage: trying to overwrite '/usr/lib/python3/dist-packages/DistUpgrade/__init__.py', which is also in package python3-update-manager 1:0.164
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120314)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Title: package python3-distupgrade 1:0.165 failed to install/upgrade: trying to overwrite '/usr/lib/python3/dist-packages/DistUpgrade/__init__.py', which is also in package python3-update-manager 1:0.164
UpgradeStatus: No upgrade log present (probably fresh install)