Perhaps NOTABUG is correct, however I was thinking a doc note could be made w/r/t drpm vs deltarpm -- this might be a RHEL8 issue, but it would be a good release note for OSP15.
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.