package xymon-client 4.3.30 failed to install/upgrade: conflicting packages - not installing xymon-client

I was doing an upgrade from 18.04 to 20.04 and this bug was automatically built by the system.

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: xymon-client 4.3.30
ProcVersionSignature: Ubuntu 5.4.0-1051.53~18.04.1-aws 5.4.119
Uname: Linux 5.4.0-1051-aws x86_64
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
CasperMD5CheckResult: skip
Date: Fri Jul 9 22:03:21 2021
Ec2AMI: ami-063aa838bd7631e0b
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: us-west-1b
Ec2InstanceType: t3a.small
Ec2Kernel: unavailable
Ec2Ramdisk: unavailable
ErrorMessage: conflicting packages - not installing xymon-client
Python3Details: /usr/bin/python3.8, Python 3.8.10, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.6
SourcePackage: xymon
Title: package xymon-client 4.3.30 failed to install/upgrade: conflicting packages - not installing xymon-client
UpgradeStatus: Upgraded to focal on 2021-07-10 (0 days ago)