Warrenty got created at the time of Internal Order shipment and not at the time of Order management

We are using compressor inside final product  called condensing Unit. During WIP Job completion we attatched compressor serial number to condensing Unit.

But when we sale final product to Customer, warrenty generated with start date as Internal Order date insted of Order management ship/fulfill.

This result in wrong warrenty record generation.

Can you guide how to resolve this. Is there any configuration which help to resolve this..

Attatched Installbase transcation details

Amol