package puppet (not installed) failed to install/upgrade: trying to overwrite '/lib/systemd/system/puppet.service', which is also in package puppet-agent 7.11.0-1focal

[mario hevia]

I was installing puppet -v 7.11.
I started with puppet server
wget https://apt.puppet.com/puppet7-release-focal.deb
sudo dpkg -i puppet7-release-focal.deb

then

sudo apt-get install puppetserver

after that I got the error.

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: puppet (not installed)
ProcVersionSignature: Ubuntu 5.11.0-37.41~20.04.2-generic 5.11.22
Uname: Linux 5.11.0-37-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
CasperMD5CheckResult: skip
Date: Wed Sep 29 18:08:54 2021
ErrorMessage: trying to overwrite '/lib/systemd/system/puppet.service', which is also in package puppet-agent 7.11.0-1focal
InstallationDate: Installed on 2021-05-29 (123 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
Python3Details: /usr/bin/python3.8, Python 3.8.10, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.6
SourcePackage: puppet
Title: package puppet (not installed) failed to install/upgrade: trying to overwrite '/lib/systemd/system/puppet.service', which is also in package puppet-agent 7.11.0-1focal
UpgradeStatus: No upgrade log present (probably fresh install)