On the Calendar Booking, I would like to offer the option to our clients to book the same meeting (on the same time slot.)

In the "Manage Calendar Booking" -> "Edit" -> "Advanced Settings" I select at "Maximum no-of meetings on same time slot" a multiple number (e.g. 5). but still, with this configuration, our slots available become unavailable to our client as soon as one said slot is booked by one client.