Why convert2rhel fails with error "'ERROR with transaction check vs depsolve:', 'redhat-indexhtml is needed by firefox-102.12.0-1.el7_9.x86_64" ?

Issue

• convert2rhel fails with error

  Resolving the dependencies of the packages in the yum transaction set.
  Downloading and validating the yum transaction set, no modifications to the system will happen this time.
  [2023-09-28T05:58:12+0000] DEBUG - Got the following exception message: [u'ERROR with transaction check vs depsolve:', 'redhat-indexhtml is needed by firefox-102.15.1-1.el7_9.x86_64']
  CRITICAL - Failed to validate the yum transaction.
  ERROR - (ERROR) VALIDATE_PACKAGE_MANAGER_TRANSACTION::UNKNOWN_ERROR - Unknown
  Description: The cause of this error is unknown, please look at the diagnosis for more information.
  Diagnosis: Failed to validate the yum transaction.
  Remediation: [No further information given]
  CRITICAL - Conversion failed.
  Writing breadcrumbs to '/etc/migration-results'.
  Writing RHSM custom facts to '/etc/rhsm/facts/convert2rhel.facts'.
  [2023-09-28T05:58:12+0000] DEBUG - Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/convert2rhel/main.py", line 124, in main_locked
  loggerinst.critical("Conversion failed.")
  File "/usr/lib/python2.7/site-packages/convert2rhel/logger.py", line 159, in _critical
  sys.exit(msg)
  SystemExit: Conversion failed.