ERROR [ ]: System.ArgumentException: An element with the same key already exists in the dictionary.
  at System.Collections.Generic.Dictionary`2[libsecondlife.LLUUID,OpenSim.Framework.Communications.Cache.CachedUserInfo].Add (LLUUID , OpenSim.Framework.Communications.Cache.CachedUserInfo ) [0x00000]
  at OpenSim.Framework.Communications.Caches.UserProfileCache.AddNewUser (LLUUID userID) [0x00000]
  at OpenSim.Region.Environment.Scenes.Scene.AddNewClient (IClientAPI client, Boolean child) [0x00000]
  at OpenSim.Region.ClientStack.ClientView.InitNewClient () [0x00000]
  at OpenSim.Region.ClientStack.ClientView.AuthUser () [0x00000]
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void ()
ERROR [ ]: System.ArgumentException: An element with the same key already exists in the dictionary.
  at System.Collections.Generic.Dictionary`2[libsecondlife.LLUUID,OpenSim.Framework.Communications.Cache.CachedUserInfo].Add (LLUUID , OpenSim.Framework.Communications.Cache.CachedUserInfo ) [0x00000]
  at OpenSim.Framework.Communications.Caches.UserProfileCache.AddNewUser (LLUUID userID) [0x00000]
  at OpenSim.Region.Environment.Scenes.Scene.AddNewClient (IClientAPI client, Boolean child) [0x00000]
  at OpenSim.Region.ClientStack.ClientView.InitNewClient () [0x00000]
  at OpenSim.Region.ClientStack.ClientView.AuthUser () [0x00000]
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void ()