ReferenceEnumsCancelAppointmentEventErrorCodeCancelAppointmentEventErrorCode ValuesAPPOINTMENT_EVENT_ALREADY_CANCELLEDThe appointment event is already cancelledAPPOINTMENT_EVENT_NOT_FOUNDThe appointment event was not foundCONCURRENCY_ERRORThe appointment event was already updatedINVALID_NOTE_HTMLThe content of the note is invalid