Some of the client is not following the proper cancelation procedure instead of canceling the already existing booking or reschedule it they are Initiate a new booking and for the 1st booking they are just simply not come.
My suggestion is the system must have a costume setting option where the salon management can decide if any client has an active booking how long can’t book the same appointment. Like within 24h or 48h or 72h.
This way we could avoid a duplicate bookings.