package libnspr4:amd64 2:4.13.1-0ubuntu0.14.04.1 failed to install/upgrade: package libnspr4:amd64 is already installed and configured

[Aditi]

I dont know..it just crashes

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: libnspr4:amd64 2:4.13.1-0ubuntu0.14.04.1
ProcVersionSignature: Ubuntu 3.13.0-116.163-generic 3.13.11-ckt39
Uname: Linux 3.13.0-116-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.23
AptdaemonVersion: 1.1.1-1ubuntu5.2
Architecture: amd64
CrashReports:
 640:0:116:120900:2017-07-20 10:03:55.910630941 +0530:2017-07-20 10:03:56.910630941 +0530:/var/crash/libfreetype6:amd64.0.crash
 600:0:116:97572:2017-07-20 10:03:37.674630403 +0530:2017-07-20 10:03:38.674630403 +0530:/var/crash/libnspr4:amd64.0.crash
 600:109:116:0:2017-07-20 10:04:02.982630944 +0530:2017-07-20 10:04:02.982630944 +0530:/var/crash/libfreetype6:amd64.0.uploaded
 644:0:116:0:2017-07-20 10:03:58.698630864 +0530:2017-07-20 10:03:58.698630864 +0530:/var/crash/libfreetype6:amd64.0.upload
 600:0:116:96545:2017-07-20 10:03:38.598630490 +0530:2017-07-20 10:03:38.546630489 +0530:/var/crash/librtmp0:amd64.0.crash
Date: Thu Jul 20 10:03:38 2017
Dependencies:
 gcc-4.9-base 4.9.3-0ubuntu4
 libc6 2.19-0ubuntu6.11
 libgcc1 1:4.9.3-0ubuntu4
 multiarch-support 2.19-0ubuntu6.11
DpkgHistoryLog:
 Start-Date: 2017-07-20 10:03:30
 Commandline: aptdaemon role='role-install-packages' sender=':1.117'
 Install: unrar:amd64 (5.0.10-1ubuntu0.14.04.1), rar:amd64 (4.2.0-1)
DuplicateSignature: package:libnspr4:amd64:2:4.13.1-0ubuntu0.14.04.1:package libnspr4:amd64 is already installed and configured
ErrorMessage: package libnspr4:amd64 is already installed and configured
InstallationDate: Installed on 2017-01-15 (185 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.7
 apt 1.0.1ubuntu2.17
SourcePackage: dpkg
Title: package libnspr4:amd64 2:4.13.1-0ubuntu0.14.04.1 failed to install/upgrade: package libnspr4:amd64 is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)