package virtualbox-guest-x11 5.0.24-dfsg-0ubuntu1.16.04.1 failed to install/upgrade: package virtualbox-guest-x11 is already installed and configured

[James Stewart Miller]

$ uname -a
Linux james-VirtualBox 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

on linux host running ubuntu studio

clean install of virtualbox latest.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: virtualbox-guest-x11 5.0.24-dfsg-0ubuntu1.16.04.1
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
CrashReports:
 640:1000:116:1201358:2016-11-08 19:18:38.252841949 +0000:2016-11-08 19:18:39.356789866 +0000:/var/crash/_usr_bin_xfce4-display-settings.1000.crash
 600:109:116:0:2016-11-08 19:18:40.696119915 +0000:2016-11-08 19:18:40.696119915 +0000:/var/crash/_usr_bin_xfce4-display-settings.1000.uploaded
 664:1000:116:0:2016-11-08 19:18:39.324805865 +0000:2016-11-08 19:18:39.324805865 +0000:/var/crash/_usr_bin_xfce4-display-settings.1000.upload
 600:0:116:158734:2016-11-08 19:27:32.397165298 +0000:2016-11-08 19:27:33.397165298 +0000:/var/crash/virtualbox-guest-utils.0.crash
 600:0:116:158954:2016-11-08 19:27:32.485209465 +0000:2016-11-08 19:27:33.485209465 +0000:/var/crash/virtualbox-guest-x11.0.crash
Date: Tue Nov 8 19:27:33 2016
DuplicateSignature:
 package:virtualbox-guest-x11:5.0.24-dfsg-0ubuntu1.16.04.1
 Processing triggers for man-db (2.7.5-1) ...
 dpkg: error processing package virtualbox-guest-utils (--configure):
  package virtualbox-guest-utils is already installed and configured
ErrorMessage: package virtualbox-guest-x11 is already installed and configured
InstallationDate: Installed on 2016-11-08 (0 days ago)
InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.12~ubuntu16.04.1
SourcePackage: dpkg
Title: package virtualbox-guest-x11 5.0.24-dfsg-0ubuntu1.16.04.1 failed to install/upgrade: package virtualbox-guest-x11 is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.X11.Xsession.d.98vboxadd-xclient: 2016-11-08T19:25:25.653330