What limitation does the TreeSave REST resource have?

The correct understanding of the limitation of the TreeSave REST resource is that it is indeed restricted to handling inserts only. This means that when using the TreeSave REST resource, you can create new records but are unable to perform updates on existing records.

This limitation is significant because it defines how users can interact with the resource, emphasizing its focus on creating new data rather than modifying or updating data that already exists. Organizations leveraging this resource must design their integration processes with this constraint in mind, ensuring that any needed updates to records must be managed through a different mechanism or resource capable of handling such operations.

In contrast, the limitations associated with other possibilities, such as handling updates or managing nested data structures, do not apply to this particular resource, as its primary function is to facilitate the insertion of new records. Similarly, the concept of handling individual record saving is too narrow; the TreeSave resource facilitates bulk inserts rather than limiting actions to individual records.