package libproxy-tools 0.4.11-5ubuntu1 failed to install/upgrade: package libproxy-tools is already installed and configured

There's a rise in such errors suddenly.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libproxy-tools 0.4.11-5ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-66.87-generic 4.4.44
Uname: Linux 4.4.0-66-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
CrashReports:
 644:0:116:0:2017-03-15 16:16:29.868041595 +0530:2017-03-15 16:16:29.868041595 +0530:/var/crash/libsdl-image1.2:amd64.0.upload
 640:0:116:4140136:2017-03-15 16:16:11.358707666 +0530:2017-03-15 16:16:12.358707666 +0530:/var/crash/libsdl1.2debian:amd64.0.crash
 644:0:116:0:2017-03-15 16:16:14.290860620 +0530:2017-03-15 16:16:14.290860620 +0530:/var/crash/libsdl1.2debian:amd64.0.upload
 640:0:116:4140415:2017-03-15 16:16:25.259775876 +0530:2017-03-15 16:16:26.259775876 +0530:/var/crash/libsdl-image1.2:amd64.0.crash
 600:0:116:320409:2017-03-15 16:15:29.218958377 +0530:2017-03-15 16:15:30.218958377 +0530:/var/crash/libproxy-tools.0.crash
Date: Wed Mar 15 16:15:30 2017
ErrorMessage: package libproxy-tools is already installed and configured
InstallationDate: Installed on 2017-03-13 (1 days ago)
InstallationMedia: Ubuntu 14.04.5 LTS "Trusty Tahr" - Release amd64 (20160803)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.19
SourcePackage: libproxy
Title: package libproxy-tools 0.4.11-5ubuntu1 failed to install/upgrade: package libproxy-tools is already installed and configured
UpgradeStatus: Upgraded to xenial on 2017-03-14 (1 days ago)