I was implementing a solution using Platform Events, and was wondering can I use ReplayId as a unique field for the new record I am creating after subscribing to fired platform event.
All I can see for Platform Events' ReplayID Field is
Each event message is assigned an opaque ID contained in the ReplayId field. The ReplayId field value, which is populated by the system, refers to the position of the event in the event stream. Replay ID values are not guaranteed to be contiguous for consecutive events. For example, the event following the event with ID 999 can have an ID of 1,025. A subscriber can store a replay ID value and use it on resubscription to retrieve events that are within the retention window. For example, a subscriber can retrieve missed events after a connection failure. Subscribers must not compute new replay IDs based on a stored replay ID to refer to other events in the stream.
There is no mention that replayId is unique and autoincrementing even after retention window.
I don't want to corrupt data if the replayId repeats itself.