How can I add a new tracking number to an already existing shipment that was created using the following endpoint https://magento.redoc.ly/2.4.0-admin/tag/orderorderIdship ?
I can create the shipment for a sale/order with the initial tracking number/s, but if I use the same endpoint from above to add a new tracking number for the same order/sale, I get the following error: "you can't create a shipment without products"
Which endpoint should I use? Is it this one https://magento.redoc.ly/2.4.0-admin/tag/shipmenttrack or https://magento.redoc.ly/2.4.0-admin/tag/shipment#operation/salesShipmentRepositoryV1SavePost or some other? The documentation for magento is confusing for me, especially as I am a beginner in magento.
Thank you