When someone does a booking from the frontend the timeslot turns red and it is no longer possible to book that time from the frontend. As it shoud be.
Our issue is that it is still possible to book that timeslot from the backend, without any warnings to the one who is booking. So if you book from the backend you can get double bookings and the system does not warn you about the fact that you are about to make a double booking. How can I fix this som that the admin gets a warning? So double bookings does not occur.
The installation is a Multisite.