package lam4-dev 7.1.4-6build2 failed to install/upgrade: installed lam4-dev package post-installation script subprocess returned error exit status 2

[priya]

this bug occurred while upgrading from ubuntu 18.04 to ubuntu 20.04

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: lam4-dev 7.1.4-6build2
ProcVersionSignature: Ubuntu 5.4.0-60.67-generic 5.4.78
Uname: Linux 5.4.0-60-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
Date: Thu Jan 14 14:51:19 2021
DuplicateSignature:
 package:lam4-dev:7.1.4-6build2
 Setting up lam4-dev (7.1.4-6build2) ...
 update-alternatives: error: alternative link /usr/lib/x86_64-linux-gnu/libmpi.so is already managed by mpi
 dpkg: error processing package lam4-dev (--configure):
  installed lam4-dev package post-installation script subprocess returned error exit status 2
ErrorMessage: installed lam4-dev package post-installation script subprocess returned error exit status 2
InstallationDate: Installed on 2019-09-03 (499 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
Python3Details: /usr/bin/python3.8, Python 3.8.5, 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 2.0.2ubuntu0.2
SourcePackage: lam
Title: package lam4-dev 7.1.4-6build2 failed to install/upgrade: installed lam4-dev package post-installation script subprocess returned error exit status 2
UpgradeStatus: Upgraded to focal on 2021-01-14 (0 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.