can't seem to upgrade from 18.04 to 20.04 because it needs ppa-purge which I can't find!

[Derrick Neve]

Just trying to upgrade from 18.04 LTS to 20.04 LTS

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38 [origin: unknown]
ProcVersionSignature: Ubuntu 4.15.0-1096.106-oem 4.15.18
Uname: Linux 4.15.0-1096-oem x86_64
ApportVersion: 2.20.9-0ubuntu7.17
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Sun Oct 11 16:09:56 2020
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-xenial-amd64-osp1-20171027-1
InstallationDate: Installed on 2019-01-03 (647 days ago)
InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20171027-10:57
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-10-11 (0 days ago)
VarLogDistupgradeTermlog:

mtime.conffile..etc.update-manager.release-upgrades: 2019-02-16T08:19:18.795393

[Derrick Neve (djn-microtec)]

Sorry for th inconvenience
I don't know what else to say