P4310 Supplier Master Validation

Per this Doc as well as at least one other thread here indicate that the P4310 is supposed to throw a hard error is there is no Supplier Master record in the F0401. In both a client and our 9.2 lab, we are able to create a PO to an AB # that does not have a corresponding F0401 Supplier Master record, e.g a Customer, a Company AB #, etc.

Is there a setting, flag or processing option somewhere that needs to be set to enable this?

E1: 43: How To Prevent the Entry of Purchase Orders (P4310) for Non-supplier Address Numbers? (Doc ID 2867385.1