package libevent-core-2.0-5:amd64 2.0.21-stable-2 failed to install/upgrade: package libevent-core-2.0-5:amd64 is already installed and configured

[Achudh krishna]

idk

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libevent-core-2.0-5:amd64 2.0.21-stable-2
ProcVersionSignature: Ubuntu 4.4.0-62.83-lowlatency 4.4.40
Uname: Linux 4.4.0-62-lowlatency x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2.5
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
CrashReports:
 644:0:116:0:2017-02-04 23:28:37.571556726 +0530:2017-02-04 23:28:37.571556726 +0530:/var/crash/mysql-client-core-5.7.0.upload
 640:0:116:2679058:2017-02-04 23:28:35.048571825 +0530:2017-02-04 23:28:36.048571825 +0530:/var/crash/mysql-client-core-5.7.0.crash
 640:0:116:2664377:2017-02-04 23:28:47.905448436 +0530:2017-02-04 23:28:48.905448436 +0530:/var/crash/libaio1:amd64.0.crash
 644:0:116:0:2017-02-04 23:28:49.926439174 +0530:2017-02-04 23:28:49.926439174 +0530:/var/crash/libaio1:amd64.0.upload
 600:0:116:390305:2017-02-04 23:28:16.914764642 +0530:2017-02-04 23:28:17.914764642 +0530:/var/crash/libevent-core-2.0-5:amd64.0.crash
Date: Sat Feb 4 23:28:17 2017
Dependencies:
 gcc-6-base 6.0.1-0ubuntu1
 libc6 2.23-0ubuntu5
 libgcc1 1:6.0.1-0ubuntu1
 multiarch-support 2.23-0ubuntu5
ErrorMessage: package libevent-core-2.0-5:amd64 is already installed and configured
InstallationDate: Installed on 2017-02-04 (0 days ago)
InstallationMedia: Ubuntu-Studio 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.19
SourcePackage: dpkg
Title: package libevent-core-2.0-5:amd64 2.0.21-stable-2 failed to install/upgrade: package libevent-core-2.0-5:amd64 is already installed and configured
UpgradeStatus: Upgraded to xenial on 2017-02-04 (0 days ago)