Let MB modify the bookings after the deadline but mark them as tentative. Admins can then mark a booking as accepted. Another option is to track changes after the deadline. That way, bookings can be tentatively deleted as well.
Let MB modify the bookings after the deadline but mark them as tentative.
Admins can then mark a booking as accepted.
Another option is to track changes after the deadline. That way, bookings can be tentatively deleted as well.