package atftpd 0.7.git20120829-3.1~0.18.04.1 failed to install/upgrade: installed atftpd package post-installation script subprocess returned error exit status 1

[Martin Bergman]

I was running do-release-upgrade from 16.04.7 to 18.04 and this problem occurred

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: atftpd 0.7.git20120829-3.1~0.18.04.1
ProcVersionSignature: Ubuntu 4.4.0-208.240-generic 4.4.262
Uname: Linux 4.4.0-208-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.23
Architecture: amd64
Date: Thu Apr 15 11:53:51 2021
ErrorMessage: installed atftpd package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2011-04-04 (3663 days ago)
InstallationMedia: Ubuntu-Server 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.2)
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: atftp
Title: package atftpd 0.7.git20120829-3.1~0.18.04.1 failed to install/upgrade: installed atftpd package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to bionic on 2021-04-15 (0 days ago)