Diameter new connection rejected as an already functioning one exists. A Diameter peer (identified by its Diameter Identity) attempted to establish a connection with the device although it already has a valid connection. The Diameter protocol allows only one connection from a particular peer. Note: This situation only occurs when DIAMETER.AllowMultipleConnectionsPerPeer is set to false, or when the multiple connections setting is turned off on the Advanced Settings of the Policy Server tab in the CMP system.