Before the fix, users had to manually add the resource class to the RDT.
After the fix, they no longer have to do that because it is now a default class in the RDT.
You get the TSS9048I messages because you previously added WBEM to the RDT.
Since you can have two resource classes with the same name, WBEM was renamed to USER0006, so WBEM can be add to the RDT as a default resource class.
If you are not using the resource class, then there really isnt anything you need to do.
If you were using it, you would have to revoke all permission to WBEM and rePERMIT it.
Issue a TSS WHOOWNS USER0006(*) to determine the owner and do a TSS WHOHAS for those USER0006 resource names in the list. You will have to REVOKE them and then rePERMIT them under WBEM resource class.