SAP Message /ISDFPS/MM607 - Storage location &1 not assigned to higher-level MRP area &2

Diagnosis
You have not flagged the stock element as "accountable for stock".
You have maintained a plant and storage location for the stock.
The storage location must be assigned to a higher-level force elementthat is accountable for stock.The storage location does not belong to ahigher-level MRP area in stock.
Maintain a suitable storage location for the stock of this forceelement.