I wrote a user event 2.0 script that updates the shipping method and carrier deployed to the item fulfillment record if an "expedite" field is checked off and I am getting this error: "Switching the shipping method to another carrier is an unsupported operation, because it requires reloading the item fulfillment form for that carrier". what does "reloading the item fulfillment form for that carrier" mean??

it means that the ship carrier that the ship method belongs to uses a different form for the item fulfillment