The scene should be rendered from a camera named 'xyz', but there is more than one camera with that name in the scene. Slaves might render different view resulting in incorrect image because of this.
This message is displayed when using distributed rendering with two or more cameras in the scene having the same object name. Distributed rendering requires a named camera to work, and because of this limitation submitting a scene with two cameras with the same name may result in incorrect rendering - images from different cameras will be blended together.
Solution: make sure that each camera in the scene is using a unique object name.
See also: How to use distributed rendering?
Similar error message: Distributed rendering from a free (non-camera) view can lead to incorrect results.