leapp upgrade fails to run due to duplicate repository configurations

Issue

/var/log/leapp/leapp-report.txt shows an inhibitor preventing leapp from upgrading the system.

Risk Factor: medium (inhibitor)
Title: A YUM/DNF repository defined multiple times
Summary: The following repositories are defined multiple times inside the "upgrade" container:
    - repo-id
Remediation: [hint] Remove the duplicate repository definitions or change repoids of conflicting repositories on the system to prevent the conflict.