fix(medusa): allow multiple fulfillments

packages/medusa/src/services/order.js

@@ -657,13 +657,6 @@ class OrderService extends BaseService {
       })
       .filter(i => !!i)
 
-    if (order.fulfillment_status !== "not_fulfilled") {
-      throw new MedusaError(
-        MedusaError.Types.INVALID_ARGUMENT,
-        "Order is already fulfilled"
-      )
-    }
-
     const { shipping_methods } = order
 
     // prepare update object