Cancel Backorder During Import
You can use REST API to cancel a backordered line.
View some example REST payloads that cancel an order line in a sales order. Go to REST API for Oracle Supply Chain Management Cloud > Order
         Management > Sales Orders for Order Hub > Create Sales Orders, then scroll down to these
            examples:
      
      
   - 39a. Set the ordered quantity to zero.
 - 39b. Set the CanceledFlag attribute.