Network.Instantiate instantiazing 2 prefabs

 void OnConnectedToServer() {
     Debug.Log ("Player Connected");
     SpawnPlayer();
     Debug.Log ("Player Spawned");
 }
 
 private void SpawnPlayer() {
     Network.Instantiate(playerPrefab, new Vector3(5f, 5f, 5f), Quaternion.identity, 0);
 }

There are no playerPrefabs in the scene. This is my console log:

 Server Initialized
 Received pong from 192.168.56.1:25000
 Received pong from 192.168.2.105:25000
 Player Connected
 Player Spawned
 There are 2 audio listeners in the scene. Please ensure there is always exactly one audio listener in the scene.
 There are 2 audio listeners in the scene. Please ensure there is always exactly one audio listener in the scene.

What could be causing this?