when Project PO was invoiced, items were sold to project at the same time


Does anyone know that why the items were sold to project when Project PO was invoiced?

i need seperate this process as below.

PO → received → invoiced → consume in production.

but, as now

at the same time with invoicing, all item are sold and i can’t use PO items in picking list.

what should i do?

That is due to the Item Consumption Project parameter. If it is enabled, the posting of purchase product Receipt/invoice will result the posting of related sale packing slip/Invoice.