bug on the fulfillmentOrderMove mutation in the new api version (2023-04)

Topic summary

A developer encountered a bug when using the fulfillmentOrderMove GraphQL mutation in Shopify API version 2023-04.

The Issue:

  • An order contains 2 units each of items ‘Test’ and ‘Other’, initially assigned to location 1
  • After moving 1 unit of each item to location 2, two FulfillmentOrder objects exist (one per location)
  • When attempting to move the ‘Test’ item from these locations to location 3, the system incorrectly creates a third unit
  • The order now shows a fulfillable quantity of 3 for ‘Test’ instead of the correct quantity of 2
  • Screenshots demonstrate the discrepancy between the actual order quantity (2) and the displayed fulfillable quantity (3)

Response:
Another user suggested posting this technical issue to the Shopify Dev/Partner community (community.shopify.dev) for better visibility, or contacting Shopify Partner support directly.

Status: The issue remains unresolved with no official response from Shopify.

Summarized with AI on October 31. AI used: claude-sonnet-4-5-20250929.

Hello to you all,

We dealt with an issue related to the new order fulfillment process in version 2023-04.

We are using GarphQL to move some items from a FulfillmentOrder object assigned to location 1 to another location.
The issue is described in more detail as follows:
We have an 2 items called ‘Test’ and ‘Other’ that exists in three different locations.
In the case of a new order created with ‘Test’ of quantity 2 and ‘Other’ of quantity 2, it is assigned to location 1 as the original location.

we are using fulfillmentOrderMove mutation to move one quantity of each item from location 1 to location 2.
There are now two FulfillmentOrders objects, each with 1 quantity of ‘Test’ item and 1 quantity of ‘Other’ item and assigned to location 1 and location 2.

The next request causes the bug:
In this case, we are using the fulfillmentOrderMove mutation to move ‘Test’ item from first two locations to another location (location 3).
It has moved the item successfully, but also shows another item that wasn’t present in the previous location, and now we have quantity of 3 items instead of 2 for ‘Test’ item.

the last request that caused the bug:

mutation fulfillmentOrderMove {
  lastRequest:
  fulfillmentOrderMove(
    id:"gid://shopify/FulfillmentOrder/6329453150446",
    newLocationId:"gid://shopify/Location/68571169006" ,
    fulfillmentOrderLineItems: [
      {id: "gid://shopify/FulfillmentOrderLineItem/13480650834158", quantity: 1}])
    {
      movedFulfillmentOrder {
        id,
        lineItems (first:20){
          nodes{
            id,
          inventoryItemId,
          }
        }
      }
      userErrors {
        field
        message
      }
      originalFulfillmentOrder {
        assignedLocation {
          location {
            id
          }
        }
      }
    },
}

As you can see in the following photos, the order object has a quantity of 2 for the ‘Test’ item, but a fulfillable quantity of 3, and the UI shows 3 quantities for the item instead of 2.

Hi,

with this being a fairly technical issue, you might have more luck in the new Shopify Dev/Partner community: https://community.shopify.dev/
It launched a few months ago, and Shopify itself is working hard on making it make sense and active :slightly_smiling_face:

If this issue still exists and hasn’t been fixed yet, I think the Shopify Partner support would be the right contact, even if that could take some time and is a lot of hassle.

Cheers

Joda