Hi,
We recently experienced an issue when posting a fulfillment to an order via the Admin Rest API. The order had 2 line items, and we mistakenly sent a “shorted” fulfillment (only 1 line item) for the order even though both line items were shipped and have the same tracking info. This resulted in the fulfillment order being marked as “closed”. When we GET the fulfillment order we see “create_fulfillment” listed in the supported_actions for the fulfillment order, but when we try to POST an additional fulfillment for the order with the 2nd line item we receive an error saying we can’t create a fulfillment for the order.
Is it possible for us to update that existing fulfillment and add the missing line item to it? We were exploring possibly using the available PUT for fulfillments, but we weren’t sure if we’d be able to add a 2nd fulfillment line item via that method since we don’t have a fulfillment_line_item_id for the new line item.