Thanks for your reply Pawel!
I was already passing in checkpoint_id but it seems the as_node=”__copy__”is what I am missing. In the meantime I solved it by getting the parent_checkpoint and using the first item in its next field in the as_node field.
Can you please point me to where you learned about as_node=”__copy__"?
Edit: I just noticed that you are passing in the whole checkpoint object. Will try that as well. As you can see in the link I shared, it only says to use checkpoint_id. If there are docs for this as well, please link them. Thanks!