Use this API to modify the shipment quantity before the shipment arrives at the Walmart Fulfillment Centers (WFS). Modifications to the shipment quantity are not allowed if the Shipment Status is Receiving, In-progress, Closed, or Cancelled.

You must provide new shipment quantities for each Stock Keeping Unit (SKU) to update the shipment quantity.

The maximum allowed addition per SKU is 6 shipment units. To remove an SKU from a shipment unit, you can reduce the quantity to 0. You cannot set all SKUs to 0; instead, you can cancel the entire inbound order.