patch https://api.apicbase.com/api/v2/inventory/outlets//create_events//bulk_update/
Updates all existing items in a creation event.
In the payload, one of id or stock_item must be given and the others must be omitted. Only specify id if editing an item that already exists in the waste event.
Only items specified in the payload will have their quantities changed. Items that were previously present in the waste event but not included in the payload will not change.