👉 Plowbacks are a type of transactional data model in which each row is associated with only one other row. This means that when a new row is created, it has no dependencies on any existing rows and can be used to update or delete an existing row without affecting the previous rows. In plowback, a row is considered a single entity and its dependencies are not tracked. When a row is being created, there is no requirement for any other rows to have a reference to that row