package wireshark-common 1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Guy Begin]

An upgrade to Wirewhark failed. It might be related to permissions, as I selected to make Wireshark available to unprivileged users.

Ubuntu 14.04.5 LTS 3.13.0-119-generic

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: wireshark-common 1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.1
ProcVersionSignature: Ubuntu 3.13.0-119.166-generic 3.13.11-ckt39
Uname: Linux 3.13.0-119-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.24
Architecture: amd64
Date: Tue Jun 6 12:32:22 2017
DpkgHistoryLog:
 Start-Date: 2017-06-06 12:32:12
 Commandline: aptdaemon role='role-commit-packages' sender=':1.299'
 Install: libwireshark5:amd64 (1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.1), libwiretap4:amd64 (1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.1, automatic), libwsutil4:amd64 (1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.1, automatic)
 Upgrade: libwireshark-data:amd64 (1.10.6-1, 1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.1), wireshark-common:amd64 (1.10.6-1, 1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.1), wireshark:amd64 (1.10.6-1, 1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.1), libtasn1-6:amd64 (3.4-3ubuntu0.4, 3.4-3ubuntu0.5), libtasn1-6:i386 (3.4-3ubuntu0.4, 3.4-3ubuntu0.5)
DuplicateSignature: package:wireshark-common:1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.1:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2014-09-03 (1006 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.7
 apt 1.0.1ubuntu2.17
SourcePackage: wireshark
Title: package wireshark-common 1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Balint Reczey (rbalint)]

From DpkgTerminalLog.txt:

Executing "addgroup --quiet --system wireshark" failed.
Most probably the wireshark group exists, but is not a system group.
Please delete the existing group or re-create it as a system group and try configuring wireshark-common again.
dpkg: error processing package wireshark-common (--configure):
 subprocess installed post-installation script returned error exit status 1

Could you please check if the wireshark group is a system group?
If it is not a system group then please remove it and run "apt-get -f install".

[Launchpad Janitor (janitor)]

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

[Guy Begin (begin-guy)]

I changed the wireshark group to a system group. No success. I will now delete it and retry.