Dolphin Bay line update failed

Does the subject want to ask "the reason why the Dolphin Bay line update failed"?

1. Travel companies or related organizations have not updated travel route information in a timely manner. You can try to contact relevant travel agencies or online travel platforms to check whether there is the latest travel route information.

2. The update of travel routes involves some special circumstances or restrictions, weather, security, policy changes, etc., resulting in update failure. In this case, it is necessary to rearrange the itinerary or choose other travel routes.