Alay, great, it's really clarify to me, and I think it make sense for adding doc to workaround it. thx file new doc bug to trace it: https://bugzilla.redhat.com/show_bug.cgi?id=1747841
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-2019:2922