SAP Message /ISDFPS/FDPDAMPO522 - Material &1 of PReq &2 is an FFFC material; it is not considered

Diagnosis
In Customizing for prioritized materials planning, you have specifiedthat, in the event of non-availability,no follow-up actions are to be carried out for materialsthat belong to FFF classes. If partial quantities are available, theyare converted to a purchase order, provided the appropriate setting hasbeen made in Customizing (Partial Order indicator).