ArgumentException: An item with the same key has already been added. Key: UnityEditor.Scripting.Scri

Unity3D导入SteamVR插件报错：

ArgumentException: An item with the same key has already been added. Key: UnityEditor.Scripting.ScriptCompilation.ScriptAssembly System.Collections.Generic.Dictionary`2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) (at <437ba245d8404784b9fbab9b439ac908>:0)

解决方法:

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