SAP Message /ISDFPS/MM716 - Supplier of PReq &1/&2 does not exist in this system

Diagnosis
This purchase requisition is a cross-system purchase requisition.This means that the requester (receiving plant/storage location) usesa different system than the supplier (supplying plant/issuing storagelocation), from a technical point of view.
As a result prioritized processing of the purchase requisition is nottriggered on this system.

Procedure
The purchase requisition is automatically transferred to the supplier'ssystem. You do not need to do anything.
After the purchase requisition has been transferred to the supplier'ssystem, prioritized processing of the purchase requisition is carriedout.