These happen when creating a Reservation outside of the defined Availabilities for a related record. For example, creating a reservation on a Friday for a staff member who only works Mondays through Thursdays. See this article for information on how to set up Availabilities for your Resources, Staff or other objects.

You can also specify a Multi dimensional availability, which would make the availability only valid when multiple dimension records are selected (e.g. a staff member can only have reservations in a single location). This is described on this page: Multi-Dimensional Availabilities

These happen when creating a Reservation for a record that is already occupied by another Reservation. For example, creating a Reservation from 8-11 and a Reservation from 9-12 in the same room

These happen when creating a Reservation that causes the related record's capacity to be exceeded. For example, creating a Reservation with 10 attendees in a room with a capacity of 6

When inserting or updating a reservation, you You can specify a condition that is applied to existing reservations in the database. Any existing reservations that do not match this condition are ignored and will not lead to double booking conflicts. An example of this would be not matching Genders in a single roommaking sure that two reservations in the same room have the same gender. This process is described on the following page.

Double Booking Matching Condition

These happen when creating a Reservation that causes the related record's capacity to be exceeded. For example, creating a Reservation with 10 attendees in a room with a capacity of 6