Once an event has been booked as tentative or definite, you are able to revert the event back to a prospect. Because prospects are a different "thing" in the database, you won't be able to use the Edit Spaces slider or the other methods you typically use to change the status on booked spaces.
To revert an event to a prospect:
- Go to either the event's details page or the its summary slider on the calendar.
- Open the more_vert more options menu and select Change Status to 'Prospect'.
- Click Save to confirm the change.