Leapp Upgrade Fails Due to File Conflicts Between `python39-*` and `python3-*` Packages

Solution Verified - Updated -

Issue

  • The Leapp in-place upgrade from RHEL 8 to RHEL 9 fails with the following error message:
Following errors occurred and the upgrade cannot continue:
    1. Actor: dnf_package_download
       Message: DNF execution failed with non zero exit code.

Environment

  • Red Hat Enterprise Linux 8.x (source system)
  • Target Upgrade: Red Hat Enterprise Linux 9.x

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