update-manager crashed with AptDaemonError in _convert_dbus_exception(): org.debian.apt: Could not cancel transaction

[Flashrom]

i want to update the system and than it crashes

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: update-manager 1:0.152.19
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu1
Architecture: i386
Date: Tue Sep 27 13:54:38 2011
ExecutablePath: /usr/bin/update-manager
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/update-manager
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
PythonArgs: ['/usr/bin/update-manager']
SourcePackage: update-manager
Title: update-manager crashed with AptDaemonError in _convert_dbus_exception(): org.debian.apt: Could not cancel transaction
UpgradeStatus: Upgraded to oneiric on 2011-09-09 (17 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Flashrom (m-schult)]

updatemanager

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #855394, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.