Assertion failed on expression: 'modifications.empty()'

今天使用畫布進行做一個prefab的時候報了一個錯
Assertion failed on expression: ‘modifications.empty()’
UnityEditorInternal.InternalEditorUtility:HierarchyWindowDrag(HierarchyProperty, Boolean, HierarchyDropMode)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

自己上網查了一下，解決辦法是：
然後在Awake中設置爲OOverlay模式就解決了。
private void Awake()
{
gameObject.GetComponent().renderMode = RenderMode.ScreenSpaceOverlay;
}