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NullReferenceException: Object reference not set to an instance of an object

UnityEditor.Graphs.Edge.WakeUp () (at <096a277c86c442f5ae0f0e204ff62657>:0)

UnityEditor.Graphs.Graph.DoWakeUpEdges (System.Collections.Generic.List`1[T] inEdges, System.Collections.Generic.List`1[T] ok, System.Collections.Generic.List`1[T] error, System.Boolean inEdgesUsedToBeValid) (at <096a277c86c442f5ae0f0e204ff62657>:0)

UnityEditor.Graphs.Graph.WakeUpEdges (System.Boolean clearSlotEdges) (at <096a277c86c442f5ae0f0e204ff62657>:0)

UnityEditor.Graphs.Graph.WakeUp (System.Boolean force) (at <096a277c86c442f5ae0f0e204ff62657>:0)

UnityEditor.Graphs.Graph.WakeUp () (at <096a277c86c442f5ae0f0e204ff62657>:0)

UnityEditor.Graphs.Graph.OnEnable () (at <096a277c86c442f5ae0f0e204ff62657>:0)



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