when and how will the released amount on a Contract Purchase Agreement is updated ?

Hello,

We want to avoid rogue buying and enforce contracts.

To test this functionality, i created and approved a contract purchase agreement for a supplier  XYZ CORP for 1000 USD.

Now i went and created a non catalog request for 50 USD for the same supplier and even referred the CPA in the non catalog request.

The requisition is approved and  approved purchase order is created.

Even now, the released amount on the CPA is zero.

In my opinion, it should have become updated to 50 , as a standard purchase order for this supplier is created for the same.

Do I need to receive and invoice this PO, for the released amount to get reflected on the CPA.