The provisioning interface is the interface on a baremetal host connected to the provisioning network. Setting a default here doesn't make a lot of sense, as it's highly dependent on the user's hardware and environment.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:0581