V1 Order Mutations Are Deprecated

The V1 order mutations — updateOrder, fulfillOrder and more than twenty siblings — are deprecated. Each names its V2 replacement in the schema, and a call to one returns a DEPRECATED_V1_ORDER_MUTATION warning in errors[] alongside its data.

They still work. createOrder is the exception and no longer accepts calls; create orders through its V2 equivalent. Version-agnostic mutations such as reloadOrders and orderOperations, and the Order read type, are unaffected.

One thing to check in your own client: the warning arrives in errors[] on an otherwise successful response, so a client set to reject any response carrying an error will throw away data it should keep.