Update Shipment Quantities

Sellers can modify the shipment quantity before the shipment arrives at the WFS fulfillment centers. Sellers can't modify the shipment quantity when Shipment Status = Receiving in Progress, Closed, or Cancelled. Sellers must provide new quantities for each SKU to update. Sellers can add up to six units per SKU, but can reduce the SKU to 0 units to remove a SKU from a shipment. However, sellers cannot change the quantity of all SKUs to 0. Instead, they must cancel the entire inbound order.