package libnss3-nssdb 2:3.28.4-0ubuntu0.16.04.3 failed to install/upgrade: package libnss3-nssdb is already installed and configured

[Florent Passedroit]

root@fpassedr:/home/fpassedr# apt install oad
E: Impossible d'obtenir le verrou /var/lib/dpkg/lock - open (11: Ressource temporairement non disponible)
E: Impossible de verrouiller le répertoire d'administration (/var/lib/dpkg/). Il est possible qu'un autre processus l'utilise.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libnss3-nssdb 2:3.28.4-0ubuntu0.16.04.3
ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35
Uname: Linux 4.4.0-59-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
CrashReports:
 600:0:116:197661:2018-01-12 02:09:23.309253454 +0100:2018-01-12 02:09:24.309253454 +0100:/var/crash/libnss3-nssdb.0.crash
 600:0:116:197682:2018-01-12 02:09:23.353253126 +0100:2018-01-12 02:09:24.353253126 +0100:/var/crash/libreoffice-common.0.crash
 600:0:116:197661:2018-01-12 02:09:24.329253206 +0100:2018-01-12 02:09:24.309253347 +0100:/var/crash/libnss3:amd64.0.crash
Date: Fri Jan 12 02:09:24 2018
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 2017-01-07 (369 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
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)