package bash 4.3-11ubuntu1 failed to install/upgrade: package bash is already installed and configured

During upgrade from 14.10 to 15.04, went to get a meal. When I came back the session timeout login screen was showing. Logging in showed a stack of report-a-problem dialogues.

ProblemType: Package
DistroRelease: Ubuntu 15.04
Package: bash
ProcVersionSignature: Ubuntu 3.16.0-41.55-generic 3.16.7-ckt11
Uname: Linux 3.16.0-41-generic i686
ApportVersion: 2.14.7-0ubuntu8.5
AptdaemonVersion: 1.1.1+bzr980-0ubuntu1.1
Architecture: i386
Date: Wed Jun 17 18:32:22 2015
DuplicateSignature: package:bash:4.3-11ubuntu1:package bash is already installed and configured
ErrorMessage: package bash is already installed and configured
InstallationDate: Installed on 2015-06-15 (1 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release i386 (20141022.1)
SourcePackage: bash
Title: package bash 4.3-11ubuntu1 failed to install/upgrade: package bash is already installed and configured
UpgradeStatus: Upgraded to vivid on 2015-06-17 (0 days ago)