package ubuntu-mono 14.04+16.04.20161024-0ubuntu1 failed to install/upgrade: package ubuntu-mono is already installed and configured

[P Gopal Krishnan]

I was trying to install software updates when I ran into this problem.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: ubuntu-mono 14.04+16.04.20161024-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-83.106-generic 4.4.70
Uname: Linux 4.4.0-83-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.6
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
Date: Thu Jul 6 13:01:43 2017
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-xenial-amd64-20160624-2
DuplicateSignature:
 package:ubuntu-mono:14.04+16.04.20161024-0ubuntu1
 Processing triggers for man-db (2.7.5-1) ...
 dpkg: error processing package accountsservice (--configure):
  package accountsservice is already installed and configured
ErrorMessage: package ubuntu-mono is already installed and configured
InstallationDate: Installed on 2017-06-15 (21 days ago)
InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.20
SourcePackage: dpkg
Title: package ubuntu-mono 14.04+16.04.20161024-0ubuntu1 failed to install/upgrade: package ubuntu-mono is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)