Crash occurred while system was unattended, installing the KDE before erradicating Gnome - 20160719-1239

Brief description of incident:
As the default Gnome Desktop Environment was still present and active, the KDE was being installed using 'apt-get install kubuntu-desktop'. Upon returning to a sleeping screen, tapping the KB/Mouse, the system woke the screen only to display a dialog box triggered to generate a bug report for whatever error occurred during the installation process.

System and Package details:
Description: Ubuntu 16.04 LTS
Release: 16.04
Package ID: kubuntu-desktop
Package: Kubuntu Plasma Desktop/Netbook system
  Installed: 1.338
  Candidate: 1.338
  Version table:
 *** 1.338 500
         500 http://us.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
         100 /var/lib/dpkg/status

Steps to reproduce:
1) Boot to the desktop of Ubuntu 16.04 with the default GNOME desktop environment
2) Open a terminal window
3) Type the following and press the Enter key to submit the command:
sudo apt-get install kubuntu-desktop

Expected results:
KDE package should install without incident.

Actual results:
KDE package installed, and is still installing, but generated errors triggering the automated creation of this bug report.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: kde-config-telepathy-accounts (not installed)
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
Architecture: amd64
Date: Tue Jul 19 12:19:46 2016
DuplicateSignature:
 package:kde-config-telepathy-accounts:(not installed)
 Unpacking kde-config-telepathy-accounts (4:15.12.3-0ubuntu1) ...
 dpkg: error processing archive /var/cache/apt/archives/kde-config-telepathy-accounts_4%3a15.12.3-0ubuntu1_amd64.deb (--unpack):
  trying to overwrite '/usr/share/accounts/services/google-im.service', which is also in package account-plugin-google 0.12+16.04.20160126-0ubuntu1
ErrorMessage: trying to overwrite '/usr/share/accounts/services/google-im.service', which is also in package account-plugin-google 0.12+16.04.20160126-0ubuntu1
InstallationDate: Installed on 2016-06-30 (19 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.12~ubuntu16.04.1
SourcePackage: ktp-accounts-kcm
Title: package kde-config-telepathy-accounts (not installed) failed to install/upgrade: trying to overwrite '/usr/share/accounts/services/google-im.service', which is also in package account-plugin-google 0.12+16.04.20160126-0ubuntu1
UpgradeStatus: No upgrade log present (probably fresh install)