package hostname 2.8.5-8600-g.efb54078a-0ubuntu1~18.04.1 failed to install/upgrade: new hostname package pre-installation script subprocess returned error exit status 2

[Lloyd Parkes]

I was running do-release-upgrade to upgrade my 18 LTS system to 20 LTS so that I can run a new version of MAAS.

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: maas 2.8.5-8600-g.efb54078a-0ubuntu1~18.04.1
ProcVersionSignature: Ubuntu 4.15.0-142.146-generic 4.15.18
Uname: Linux 4.15.0-142-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.23
Architecture: amd64
Date: Sun Apr 18 12:42:17 2021
ErrorMessage: new maas package pre-installation script subprocess returned error exit status 2
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.9, python3-minimal, 3.6.7-1~18.04
PythonDetails: /usr/bin/python2.7, Python 2.7.17, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2.3
 apt 1.6.13
SourcePackage: maas
Title: package hostname 2.8.5-8600-g.efb54078a-0ubuntu1~18.04.1 failed to install/upgrade: new hostname package pre-installation script subprocess returned error exit status 2
UpgradeStatus: Upgraded to focal on 2021-04-18 (0 days ago)