Dnf shows message of "Repository InstallMedia is listed more than once in the configuration" in clientVM registered to Red Hat Satellite 6.

Issue

• Dnf shows message of "Repository InstallMedia is listed more than once in the configuration" in clientVM registered to Red Hat Satellite 6.

   # dnf info mdatp
   Updating Subscription Management repositories.
   Repository rhel-8-for-x86_64-baseos-rpms is listed more than once in the configuration
   Repository ansible-2.9-for-rhel-8-x86_64-rpms is listed more than once in the configuration
   Errors during downloading metadata for repository 'rhel-8-for-x86_64-appstream-rpms':
     - Curl error (58): Problem with the local SSL certificate for https://satellite.example.com/pulp/repos/Org/RHEL_8_DEV/RHEL8/content/dist/rhel8/8/x86_64/appstream/os/repodata/repomd.xml [could 
   not load PEM client certificate, OpenSSL error error:02001002:system library:fopen:No such file or directory, (no key found, wrong pass phrase, or wrong file format?)]
   Error: Failed to download metadata for repo 'rhel-8-for-x86_64-appstream-rpms': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried