Starting an EXISTING Transaction Item via Orchestrator API

Hey, I’ve been looking into the Orchestrator API and I can create queue items, create new transaction items, etc. But I’m having trouble starting an existing transaction item (i.e. setting it to In Progress). Is this possible? I’ve tried using the odata/Queues/UiPathODataSvc.StartTransaction endpoint but I’ve had no luck… Can I reference a queue item by their unique reference key to start the transaction item?

It is not possible to manually change it.
However through automation you can achieve it by using Postpone Transaction activity .
You can explore about Postpone Transaction activity to make queue item status change from “Inprogress” to “New” via Automation.