Stock mouvement 351 from purchase order : committed quantity

Hello,

I currently have MRP running for a division. It creates purchase requisitions with the quantity necessary to transfer. In ME59N there is a check availability between the purchase requisition and the purchase order (transfer between division). So in my purchase order, there are 2 different quantities available : schedule quantity and committed quantity.

Schedule quantity is the same quantity as in the purchase requisition.

Committed quantity is equal to the schedule quantity if there is enough stock in the issuing plant. If there is not enough, the committed quantity is equal to the quantity available in the issuing plant.

So far everything is perfect. But when I create my stock movement 351 in MIGO or MB1B, I can't find a way to select the committed quantity by default. The movement is related to the purchase order, and selects automatically the schedule quantity.

Is there a standard way to force the committed quantity in the movement 351?

Thanks in advance for your help!