ASCP didnt calculate onhand in Org Y

Hi Community,

So, i have two ORG: X & Y

I create forecast in Org X (Demand) = Item A 100 PCS, which is the ingredient for item A is item B = 100 pcs too

Onhand item B in ORG X (Supply) = 50 pcs

Onhand item B in ORG Y (Supply) = 10 pcs

I run data collection and launch plan in ORG X, i want to create purchase requisition for item B in ORG X

But the result is the system didnt calculate onhand in ORG Y. The Workbench only recommended to create purchase requisition form item B 50 pcs ( 100 PCS demand from forecast - 50 PCS supply in ORG X )