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- Mementos can no longer be created by specifying a timestamp, and are always created on the current resource state at the current time.
- A memento can only be created if a resource has changed since the most recent memento was created. If the resource has not changed, the create memento request will return a
409-Conflict. - Binaries and their descriptions are versioned independently. That is to say, creating a memento on a binary does not create a memento on its binary description, and vice versaMementos cannot be deleted.