Installing the NVidia driver from Settings / Software and updates / Additional Drivers

[Vincent]

I was installing the NVIDIA binary drivers from Settings / Software and updates / Additional Drivers when this error occurred at the end of the installation.
However, the specified driver seems installed.

System: Ubuntu 16.04

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libnss3-nssdb 2:3.28.4-0ubuntu0.16.04.3
ProcVersionSignature: Ubuntu 4.4.0-130.156-generic 4.4.134
Uname: Linux 4.4.0-130-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
Date: Mon Jul 9 20:01:44 2018
DpkgHistoryLog:
 Start-Date: 2018-07-09 20:01:07
 Commandline: aptdaemon role='role-commit-packages' sender=':1.85'
 Install: libcuda1-384:amd64 (384.130-0ubuntu0.16.04.1, automatic), xserver-xorg-legacy:amd64 (2:1.18.4-0ubuntu0.7, automatic), dkms:amd64 (2.2.0.3-2ubuntu11.5, automatic), nvidia-prime:amd64 (0.8.2, automatic), libxnvctrl0:amd64 (361.42-0ubuntu1, automatic), lib32gcc1:amd64 (1:6.0.1-0ubuntu1, automatic), libc6-i386:amd64 (2.23-0ubuntu10, automatic), screen-resolution-extra:amd64 (0.17.1.1~16.04.1, automatic), ocl-icd-libopencl1:amd64 (2.2.8-1, automatic), libjansson4:amd64 (2.7-3, automatic), bbswitch-dkms:amd64 (0.8-3ubuntu1, automatic), nvidia-opencl-icd-384:amd64 (384.130-0ubuntu0.16.04.1, automatic), nvidia-384:amd64 (384.130-0ubuntu0.16.04.1), nvidia-settings:amd64 (361.42-0ubuntu1, automatic)
DuplicateSignature:
 package:libnss3-nssdb:2:3.28.4-0ubuntu0.16.04.3
 Processing triggers for mime-support (3.59ubuntu1) ...
 dpkg: error processing package libnss3-nssdb (--configure):
  package libnss3-nssdb is already installed and configured
ErrorMessage: package libnss3-nssdb is already installed and configured
InstallationDate: Installed on 2016-06-20 (749 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.15ubuntu0.2
SourcePackage: dpkg
Title: package libnss3-nssdb 2:3.28.4-0ubuntu0.16.04.3 failed to install/upgrade: package libnss3-nssdb is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.