package python-ldb 2:1.1.24-1ubuntu3 failed to install/upgrade: package python-ldb is already installed and configured

[rangasundar]

got this error while booting

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: python-ldb 2:1.1.24-1ubuntu3
ProcVersionSignature: Ubuntu 4.8.0-51.54~16.04.1-generic 4.8.17
Uname: Linux 4.8.0-51-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
CrashReports:
 640:0:116:661733:2017-05-02 21:12:47.493475914 +0530:2017-05-03 08:55:31.624218388 +0530:/var/crash/python-crypto.0.crash
 640:0:116:665561:2017-05-02 21:56:08.033267498 +0530:2017-05-02 21:56:09.033267498 +0530:/var/crash/python-dnspython.0.crash
 600:109:116:0:2017-05-03 08:56:21.044216186 +0530:2017-05-03 08:56:21.044216186 +0530:/var/crash/python-crypto.0.uploaded
 600:0:116:292701:2017-05-02 19:51:00.065126180 +0530:2017-05-02 19:51:01.065126180 +0530:/var/crash/python-ldb.0.crash
 644:0:116:0:2017-05-02 21:12:50.470086818 +0530:2017-05-02 21:12:50.470086818 +0530:/var/crash/python-crypto.0.upload
Date: Tue May 2 19:51:01 2017
DuplicateSignature:
 package:python-ldb:2:1.1.24-1ubuntu3
 Processing triggers for man-db (2.7.5-1) ...
 dpkg: error processing package python-dnspython (--configure):
  package python-dnspython is already installed and configured
ErrorMessage: package python-ldb is already installed and configured
InstallationDate: Installed on 2017-03-12 (51 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.20
SourcePackage: dpkg
Title: package python-ldb 2:1.1.24-1ubuntu3 failed to install/upgrade: package python-ldb is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)