Cancelation of Sales order shipment doesnt reduce the withdrawal quantity

Hi,

I have this scenario, where if a Sales order shipment gets cancelled with a 602 Goods movement, I dont see the correct reflection of withdrawal quantity in RRP3. For eg: There was a total of 26 shipments initially, the withdrawal qty is 26 in APO, User cancelled quantity of 3 of them from a sales order delivery, so ideally the Forecast Tab in RRP3 should indicate 23 in Withdrawal and the 3 should be in the Allocated column.

FYI:

Forecast Consumption happens in SNP ( Consumption characteristics are Material/Plant/Customer ).

Please advise whether we are missing any Config or is this a standard beheavior where the withdrawal quantity remains static irrespective of Delivery cancelation.

Regards

Gk