Back to Back Reservations - Stop Reservation by Lot

HI,

we are using back to back sales orders, when the PR converted to PO, it is linked with the Sales order automatically in the reservations window.

When the stock against the purchases received into inventory, it is automatically reserved against the sales order automatically as well.

However, currently it is reserving by Item & Lot which it is received thro' the purchase order. Is there a setup / way we can limit this reservation by Item and not Lot.

For eg:-

1. sales order s1001 created with Item1 Qty 10 (back to back)

2. PR pr1001 created with item1 qty 10

3 PO po1001 created with item1 qty 10