package systemd-sysv 225-1ubuntu9.1 failed to install/upgrade: pre-dependency problem - not installing systemd-sysv

[Vicente]

Trying to upgrade from 15.10 to 16.04 provoked this error

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: systemd-sysv 229-4ubuntu4
ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
Uname: Linux 4.2.0-35-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
Date: Sun Apr 17 23:45:14 2016
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-precise-amd64-20130203-1
ErrorMessage: pre-dependency problem - not installing systemd-sysv
InstallationDate: Installed on 2014-01-06 (832 days ago)
InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20130203-13:50
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1
 apt 1.2.10ubuntu1
SourcePackage: systemd
Title: package systemd-sysv 225-1ubuntu9.1 failed to install/upgrade: pre-dependency problem - not installing systemd-sysv
UpgradeStatus: Upgraded to xenial on 2016-04-17 (0 days ago)