[Sat 5] satellite-sync fails with "Error 31 - This system does not have a valid entitlement for Red Hat Network"

Issue

# satellite-sync
10:22:02 Red Hat Satellite - live synchronization
10:22:02    url: https://satellite.rhn.redhat.com
10:22:02    debug/output level: 1
10:22:02
10:22:02
ERROR: there was a problem synchronizing the information.
       Error message:
Error Class Code: 6001
Error Class Info:
     RHN is in the process of being decommissioned and systems are no longer able to receive updates or make use of any RHN services.
     Please see https://access.redhat.com/articles/2979901 for more info.