package lightdm 1.18.3-0ubuntu1.1 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 10

[Ekanath Chougale]

Login Loop is happening.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: lightdm 1.18.3-0ubuntu1.1
ProcVersionSignature: Ubuntu 4.10.0-32.36~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-32-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
AptOrdering:
 lightdm: Purge
 NULL: ConfigurePending
Architecture: amd64
Date: Sat Aug 12 22:49:35 2017
ErrorMessage: subprocess installed pre-removal script returned error exit status 10
InstallationDate: Installed on 2017-08-12 (0 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
LightdmConfig:
 [SeatDefaults]
 greeter-session=unity-greeter
 user-session=gnome
 greeter-show-manual-login=true
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.24
SourcePackage: lightdm
Title: package lightdm 1.18.3-0ubuntu1.1 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 10
UpgradeStatus: No upgrade log present (probably fresh install)