VR Multiplayer Version 6000.0.9

I have an error. I’m using the VR multiplayer template in version 6000.0.9. I was organizing the “Player_appearance_UI” UI and I’m getting this error. I don’t know why this is happening. If someone could help me with a little information, I would appreciate it.

Error: ArgumentException: An item with the same key has already been added. Key:
System.Collections.Generic.Dictionary2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) (at <31f653231f9c419fb92653c958b2eaf6>:0) System.Collections.Generic.Dictionary2[TKey,TValue].Add (TKey key, TValue value) (at <12897913728>:0)
Unity.Tutorials.Core.SceneObjectGuidManager.Register (Unity.Tutorials.Core.SceneObjectGuid component) (at ./Library/PackageCache/com.unity.learn.iet-framework/Runtime/SceneObjectGuidManager.cs:39)