Quantity return back to requisition

Hi,

      We created the blanket order and we created the release based on requisition. Our requirement is after receiving the line partially(Example order line qty is 10000 and received the qty 5000 and balance qty is 5000. We need to return back to this qty to requisition), Is there possible to cancel  or any other possible for that order line and return back the quantity to requisition.Then we autocreate the requisition to some other supplier. Please  guide us how to do this?

Regards,

Sundar Rajan