package ubuntu-mono 14.04+16.04.20160415-0ubuntu1 failed to install/upgrade: package ubuntu-mono is not ready for configuration cannot configure (current status 'half-installed')

unable to update

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: ubuntu-mono 14.04+16.04.20160415-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Fri Jun 3 00:35:34 2016
DuplicateSignature:
 package:ubuntu-mono:14.04+16.04.20160415-0ubuntu1
 Processing triggers for hicolor-icon-theme (0.15-0ubuntu1) ...
 dpkg: error processing package ubuntu-mono (--configure):
  package ubuntu-mono is not ready for configuration
ErrorMessage: package ubuntu-mono is not ready for configuration cannot configure (current status 'half-installed')
InstallationDate: Installed on 2016-05-11 (25 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.12~ubuntu16.04.1
SourcePackage: ubuntu-themes
Title: package ubuntu-mono 14.04+16.04.20160415-0ubuntu1 failed to install/upgrade: package ubuntu-mono is not ready for configuration cannot configure (current status 'half-installed')
UpgradeStatus: No upgrade log present (probably fresh install)