package libgksu2-0 2.0.13~pre1-6ubuntu8 failed to install/upgrade: package libgksu2-0 is already installed and configured

[Nitish]

It just keeps popping up every time I reboot. I think it has to do something with the 404 errors I get while apt-get, many package sources are saying 404 not found. I've tried changing servers too.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libgksu2-0 2.0.13~pre1-6ubuntu8
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
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
Date: Sat May 28 07:19:07 2016
DuplicateSignature:
 package:libgksu2-0:2.0.13~pre1-6ubuntu8
 Processing triggers for libglib2.0-0:amd64 (2.48.0-1ubuntu4) ...
 dpkg: error processing package libgksu2-0 (--configure):
  package libgksu2-0 is already installed and configured
ErrorMessage: package libgksu2-0 is already installed and configured
InstallationDate: Installed on 2016-05-27 (1 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.10ubuntu1
SourcePackage: dpkg
Title: package libgksu2-0 2.0.13~pre1-6ubuntu8 failed to install/upgrade: package libgksu2-0 is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)