package linux-image-4.8.0-51-generic 4.8.0-51.54~16.04.1 failed to install/upgrade: package linux-image-4.8.0-51-generic is already installed and configured

[James Law]

tried to update with realtek driver and encounter such issue

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: linux-image-4.8.0-51-generic 4.8.0-51.54~16.04.1
ProcVersionSignature: Ubuntu 4.8.0-51.54~16.04.1-generic 4.8.17
Uname: Linux 4.8.0-51-generic i686
ApportVersion: 2.20.1-0ubuntu2.5
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: i386
Date: Fri May 5 15:14:02 2017
DuplicateSignature:
 package:linux-image-4.8.0-51-generic:4.8.0-51.54~16.04.1
 Unpacking intel-microcode (3.20151106.1) ...
 dpkg: error processing package libnss3-nssdb (--configure):
  package libnss3-nssdb is already installed and configured
ErrorMessage: package linux-image-4.8.0-51-generic is already installed and configured
InstallationDate: Installed on 2017-04-05 (29 days ago)
InstallationMedia: Xubuntu 16.04.2 LTS "Xenial Xerus" - Release i386 (20170215)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.20
SourcePackage: dpkg
Title: package linux-image-4.8.0-51-generic 4.8.0-51.54~16.04.1 failed to install/upgrade: package linux-image-4.8.0-51-generic is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)