Developer docs
duplicate_item gains group_id and item_name arguments in API version 2027-01
The duplicate_item mutation accepts two new optional arguments, group_id and item_name, in API versions 2027-01 and later. They let you place the copy in a chosen group and name it.
group_id sets the group the new item is added to. It defaults to the original item's group and is not supported for subitems.
item_name sets the new item's name. A name different from the original is used as given. If you pass the original name, or no name, the copy still gets the (copy) suffix.
See the items reference for an example mutation.