package libapt-inst1.5:amd64 1.0.1ubuntu2.14 failed to install/upgrade: package libapt-inst1.5:amd64 is already installed and configured

[Shashank]

I got the error after installing below package.
gnome-session-fallback

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: libapt-inst1.5:amd64 1.0.1ubuntu2.14
ProcVersionSignature: Ubuntu 4.2.0-27.32~14.04.1-generic 4.2.8-ckt1
Uname: Linux 4.2.0-27-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.21
AptdaemonVersion: 1.1.1-1ubuntu5.2
Architecture: amd64
CrashReports:
 640:0:116:1872888:2016-06-11 13:17:19.952006340 +0530:2016-06-11 13:17:23.656006520 +0530:/var/crash/libtasn1-6:amd64.0.crash
 600:0:116:210370:2016-06-11 04:05:34.114207029 +0530:2016-06-11 04:05:35.114207029 +0530:/var/crash/libexpat1:amd64.0.crash
 600:0:116:210377:2016-06-11 04:05:34.098206996 +0530:2016-06-11 04:05:35.098206996 +0530:/var/crash/libapt-inst1.5:amd64.0.crash
 600:109:116:0:2016-06-11 13:17:25.912006600 +0530:2016-06-11 13:17:25.912006600 +0530:/var/crash/libtasn1-6:amd64.0.uploaded
 644:0:116:0:2016-06-11 13:17:22.632006483 +0530:2016-06-11 13:17:22.632006483 +0530:/var/crash/libtasn1-6:amd64.0.upload
Date: Sat Jun 11 04:05:35 2016
DuplicateSignature: package:libapt-inst1.5:amd64:1.0.1ubuntu2.14:package libapt-inst1.5:amd64 is already installed and configured
ErrorMessage: package libapt-inst1.5:amd64 is already installed and configured
InstallationDate: Installed on 2016-06-10 (0 days ago)
InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.6
 apt 1.0.1ubuntu2.14
SourcePackage: apt
Title: package libapt-inst1.5:amd64 1.0.1ubuntu2.14 failed to install/upgrade: package libapt-inst1.5:amd64 is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)

[Shashank (s4shashank4)]

also i installed wifi driver for my acer E5-571-36RX from Ubuntu installation disk.