[APPLICATION]: 
APPLICATION EXCEPTION DETECTED: System.UnhandledExceptionEventArgs

Exception: System.ArgumentException: An element with the same key already exists in the dictionary.
  at System.Collections.Generic.Dictionary`2[libsecondlife.LLUUID,OpenSim.Region.Environment.Scenes.SceneObjectPart].Add (LLUUID , OpenSim.Region.Environment.Scenes.SceneObjectPart ) [0x00000] 
  at OpenSim.Region.Environment.Scenes.SceneObjectGroup.AddPart (OpenSim.Region.Environment.Scenes.SceneObjectPart part) [0x00000] 
  at OpenSim.Region.Environment.Scenes.SceneObjectGroup..ctor (OpenSim.Region.Environment.Scenes.Scene scene, UInt64 regionHandle, System.String xmlData) [0x00000] 
  at OpenSim.Region.Environment.Scenes.Scene.AddRezObject (System.String xmlData, LLVector3 pos) [0x00000] 
  at OpenSim.Region.Environment.Scenes.Scene.RezObject (IClientAPI remoteClient, LLUUID itemID, LLVector3 pos) [0x00000] 
  at OpenSim.Region.Environment.Scenes.Scene.RezObject (IClientAPI remoteClient, LLUUID itemID, LLVector3 RayEnd, LLVector3 RayStart, LLUUID RayTargetID, Byte BypassRayCast, Boolean RayEndIsIntersection, UInt32 EveryoneMask, UInt32 GroupMask, UInt32 NextOwnerMask, UInt32 ItemFlags, Boolean RezSelected, Boolean RemoveItem, LLUUID fromTaskID) [0x00000] 
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void_IClientAPI_LLUUID_LLVector3_LLVector3_LLUUID_byte_bool_uint_uint_uint_uint_bool_bool_LLUUID (OpenSim.Framework.IClientAPI,libsecondlife.LLUUID,libsecondlife.LLVector3,libsecondlife.LLVector3,libsecondlife.LLUUID,byte,bool,uint,uint,uint,uint,bool,bool,libsecondlife.LLUUID)
  at OpenSim.Region.ClientStack.ClientView.ProcessInPacket (libsecondlife.Packets.Packet Pack) [0x00000] 
  at OpenSim.Region.ClientStack.ClientView.ClientLoop () [0x00000] 
  at OpenSim.Region.ClientStack.ClientView.AuthUser () [0x00000] 
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void ()

Application is terminating: True