Indicates that the request could not be processed because of conflict in the current state of the resource, such as an edit conflict between multiple simultaneous updates. In the JRNI API where this typically occurs when booking a time slot that is fully booked.
It may also be returned if using a Service ID for a non bookable service with a Public API call or if the Minimum Advance Time for a service is incorrectly configured in the JRNI platform.
For Public API booking journeys, the Auth-Token returned from the Basket Add Item call must be used with the Basket Checkout call otherwise a 409 error will be returned.