How to ensure a time slot can only be selected once?

Time-Slot Intervals dictate the frequency of available appointment slots to the client when booking For example, if you set an interval of 30 minutes,

Also known as “first come first serve' scheduling, time-slot scheduling is a popular and straightforward method to stay organized It

appointment slot meaning If the appointment time you selected is now showing as unavailable, someone else may have booked your preferred appointment slot before you finished your

appointment slot Essentially, time-slot or stream scheduling is when a customer is provided with a list of available time-slots to choose from The customer