FBDI/REST API to update item structures table in the simulation set of planning

Hi,

Our requirement is to end date a component item of an item structure and add another component item as an alternate to this end dated item inside the simulation set (item structures table). We have tried this approach manually by altering the existing component item in the simulation by giving an end date to it and also adding an alternate component item with a start date subsequently. But we are looking if there is any FBDI/REST API approach to make these updates in the items structures table of a simulation set as it will be difficult to update/alter if the