[Bug 1989811] Re: Failed upgrade 20.04 to 22.04: package usrmerge 25ubuntu2 failed to install/upgrade: installed usrmerge package post-installation script subprocess /usr/modules

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** Tags removed: need-duplicate-check

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Title:
  Failed upgrade 20.04 to 22.04: package usrmerge 25ubuntu2 failed to
  install/upgrade: installed usrmerge package post-installation script
  subprocess /usr/modules

Status in usrmerge package in Ubuntu:
  New

Bug description:
  Upgrade from 20.04 to 22.04 fails. Thereafter...

  
  Setting up usrmerge (25ubuntu2) ...
  Smartmatch is experimental at /usr/lib/usrmerge/convert-usrmerge line 172.
  mv: cannot move '/lib/modules' to '/usr/lib/modules': Device or resource busy

  FATAL ERROR:
  mv --no-clobber /lib/modules /usr/lib/modules: rc=1

  You can try correcting the errors reported and running again
  /usr/lib/usrmerge/convert-usrmerge until it will complete without errors.
  Do not install or update other Debian packages until the program
  has been run successfully.

  dpkg: error processing package usrmerge (--configure):
   installed usrmerge package post-installation script subprocess returned error exit status 1
  Errors were encountered while processing:
   usrmerge
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  ProblemType: Package
  DistroRelease: Ubuntu 22.04
  Package: usrmerge 25ubuntu2
  ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
  Uname: Linux 3.13.0-37-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.1
  Architecture: amd64
  CasperMD5CheckResult: unknown
  Date: Thu Sep 15 17:08:57 2022
  ErrorMessage: installed usrmerge package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2014-04-18 (3072 days ago)
  InstallationMedia:
   
  PackageArchitecture: all
  Python3Details: /usr/bin/python3.10, Python 3.10.4, python3-minimal, 3.10.4-0ubuntu2
  PythonDetails: N/A
  RebootRequiredPkgs: Error: path contained symlinks.
  RelatedPackageVersions:
   dpkg 1.21.1ubuntu2.1
   apt  2.4.7
  SourcePackage: usrmerge
  Title: package usrmerge 25ubuntu2 failed to install/upgrade: installed usrmerge package post-installation script subprocess returned error exit status 1
  UpgradeStatus: Upgraded to jammy on 2022-09-15 (0 days ago)

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