package lightdm 1.18.3-0ubuntu1.1 failed to install/upgrade: package lightdm is already installed and configured

[Youkai]

i recently install nvidia driver 381

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: lightdm 1.18.3-0ubuntu1.1
Uname: Linux 4.8.9-040809-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.5
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
CrashReports:
 640:0:116:703846:2017-04-15 15:23:59.917517662 -0500:2017-04-15 15:24:00.917517662 -0500:/var/crash/flashplugin-installer.0.crash
 644:0:116:0:2017-04-15 15:24:01.957558124 -0500:2017-04-15 15:24:01.957558124 -0500:/var/crash/flashplugin-installer.0.upload
 600:0:116:248687:2017-04-15 15:17:29.672420501 -0500:2017-04-15 15:17:30.672420501 -0500:/var/crash/lightdm.0.crash
 640:0:116:697623:2017-04-15 15:23:28.021250247 -0500:2017-04-15 15:23:29.021250247 -0500:/var/crash/chromium-codecs-ffmpeg-extra.0.crash
Date: Sat Apr 15 15:17:31 2017
DuplicateSignature:
 package:lightdm:1.18.3-0ubuntu1.1
 Processing triggers for man-db (2.7.5-1) ...
 dpkg: error processing package chromium-codecs-ffmpeg-extra (--configure):
  package chromium-codecs-ffmpeg-extra is already installed and configured
ErrorMessage: package lightdm is already installed and configured
InstallationDate: Installed on 2016-09-24 (203 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.19
SourcePackage: dpkg
Title: package lightdm 1.18.3-0ubuntu1.1 failed to install/upgrade: package lightdm is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)