MRP Purchase Requisition.

MRP-Purchase Requisition

Project-- WBS Element Network Activity Material --Reservation.

MRP Run (MD01) -

Planned Orders created-----Collective conversion of planned orders into Purchase Requisitions (MD15).

Purchase Requisition is created for quantity (10 Nos.) against the Reservation for the Project. Suppose if we change the quantity in Reservation (5 Nos.), we need to update the same Purchase Requisition for the Quantity (5 Nos.) during the Next MRP Run.

When the Material Requirement date is in Future, during the MRP Run the Purchase Requisition is creating again and again by deleting the Previous Purchase Requisition.

If any changes made in the Project Reservation, are these changes can automatically updated in the same Purchase Requisition in the next MRP Run?

At present during next MRP Run the system creating new Purchase Requisition by deleting the Previous Purchase Requisition.

Now the issue is we need the changes to be updated in the same Purchase Requisition.

Can any body tell how to solve the above issue?