package urfkill 0.6.0~20150318.103828.5539c0d.1-0ubuntu6 failed to install/upgrade: installed urfkill package pre-removal script subprocess returned error exit status 1

[richard slack]

on partial update of 18.04 get this message

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: urfkill 0.6.0~20150318.103828.5539c0d.1-0ubuntu6
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
AptOrdering:
 urfkill:amd64: Remove
 NULL: ConfigurePending
Architecture: amd64
Date: Wed May 9 08:09:39 2018
ErrorMessage: installed urfkill package pre-removal script subprocess returned error exit status 1
InstallationDate: Installed on 2016-07-12 (668 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.1
SourcePackage: urfkill
Title: package urfkill 0.6.0~20150318.103828.5539c0d.1-0ubuntu6 failed to install/upgrade: installed urfkill package pre-removal script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)