Split items shipped with same allocation ID


If two items from the same order have the same allocation ID but they are splitted for shipment? Is it possible to create a splitted shipment with two different tracking numbers?

I tried to send them to veeqo via the /shipments endpoint, but if the allocation id for shipment 1 has been upload already, then I received a 400 error saying that the allocation ID already exist, so the order gets marked as shipped, but the second tracking number for the second item doesn’t uploads

Thank you