package usrmerge 24ubuntu3.1 failed to install/upgrade: installed usrmerge package post-installation script subprocess returned error exit status 1

[Anabela Mazurek]

When doing release upgrade from 21.04 to 21.10 there is error
The upgrade has aborted. Your system could be in an unusable state. A
recovery will run now (dpkg --configure -a).

Setting up usrmerge (24ubuntu3.1) ...
Smartmatch is experimental at /usr/lib/usrmerge/convert-usrmerge line 172.

FATAL ERROR:
Both /lib/x86_64-linux-gnu/libc.so.6 and /usr/lib/x86_64-linux-gnu/libc.so.6 exist.

ProblemType: Package
DistroRelease: Ubuntu 21.04
Package: usrmerge 24ubuntu3.1
ProcVersionSignature: Ubuntu 5.11.0-46.51-generic 5.11.22
Uname: Linux 5.11.0-46-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu65.4
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Tue Jan 18 19:38:49 2022
DistributionChannelDescriptor:
 # This is the distribution channel descriptor for the OEM CDs
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-bionic-amd64-20180608-47+matira-5-7-r+X58
ErrorMessage: installed usrmerge package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2019-11-20 (790 days ago)
InstallationMedia: Ubuntu 18.04 "Bionic" - Build amd64 LIVE Binary 20180608-09:38
PackageArchitecture: all
Python3Details: /usr/bin/python3.9, Python 3.9.5, python3-minimal, 3.9.4-1
PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.18-9
RebootRequiredPkgs: Error: path contained symlinks.
RelatedPackageVersions:
 dpkg 1.20.9ubuntu1
 apt 2.2.4ubuntu0.1
SourcePackage: usrmerge
Title: package usrmerge 24ubuntu3.1 failed to install/upgrade: installed usrmerge package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to hirsute on 2022-01-18 (0 days ago)