package xubuntu-core 2.206 failed to install/upgrade: package xubuntu-core is already installed and configured

[Usama Khan]

i dont understand decreasing my system performance

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: xubuntu-core 2.206
ProcVersionSignature: Ubuntu 4.13.0-38.43~16.04.1-generic 4.13.16
Uname: Linux 4.13.0-38-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.16
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
Date: Fri Apr 20 10:35:58 2018
DuplicateSignature:
 package:xubuntu-core:2.206
 Processing triggers for hicolor-icon-theme (0.15-0ubuntu1) ...
 dpkg: error processing package xubuntu-default-settings (--configure):
  package xubuntu-default-settings is already installed and configured
ErrorMessage: package xubuntu-core is already installed and configured
InstallationDate: Installed on 2018-03-28 (23 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.4
 apt 1.2.26
SourcePackage: dpkg
Title: package xubuntu-core 2.206 failed to install/upgrade: package xubuntu-core is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)