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Creator 版本：1.9.1
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目标平台：
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详细报错信息，包含调用堆栈：
Should not add cc.Sprite to a node which size is already used by its other component.
at Object.errorID (/Applications/CocosCreator.app/Contents/Resources/engine/CCDebugger.js:343:18)
at cc_Sprite._registSizeProvider (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/core/components/CCSGComponent.js:94:20)
at cc_Sprite.__preload (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/core/components/CCRendererUnderSG.js:61:14)
at cc_Sprite.Sprite.__preload (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/core/components/CCSprite.js:629:14)
at call__preloadInTryCatch (eval at misc.tryCatchFunctor_EDITOR (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/core/utils/misc.js:1:1),
24)
at CCClass._invoke (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/core/component-scheduler.js:233:21)
at CCClass.invoke (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/core/node-activator.js:65:14)
at CCClass.activateNode (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/core/node-activator.js:225:26)
at cc_Node.set [as active] (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/core/utils/base-node.js:298:56)
Error: child already added. It can’t be added again
at call__preloadInTryCatch (eval at misc.tryCatchFunctor_EDITOR (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/core/utils/misc.js:1:1), 
20)
at CCClass._invoke (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/core/component-scheduler.js:233:21)
at CCClass.invoke (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/core/node-activator.js:65:14)
at CCClass.activateNode (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/core/node-activator.js:225:26)
at cc_Node.set [as active] (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/core/utils/base-node.js:298:56)
at cc_DynamicAnimCurve.sample (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/animation/animation-curves.js:212:32)
at AnimationState.proto.sample (/Applications/CocosCreator.app/Contents/Resources/engine/cocos2d/animation/animation-state.js:367:15)
at Object._changeCurrentClip (/Applications/CocosCreator.app/Contents/Resources/app.asar/editor/page/scene-utils/anim-utils.js:1:3114)
at _queue.Async.queue (/Applications/CocosCreator.app/Contents/Resources/app.asar/editor/page/scene-utils/tasks.js:1:551)
- 重现方式：
我的工程中有个prefab，结构如下：
Turn Animation Node绑定了一个Animation：
在未报错的时候，Energy Sprite 节点下面是有一个Sprite：
当对Turn Animation Node 动画编辑器编辑按钮点击3下（也就是编辑、取消编辑、再编辑）就会报错：
报错信息就是上面的信息，直接影响是把Energy Sprite中的Sprite直接给我删了：
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之前哪个版本是正常的 ：不知道
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编辑器操作系统 ：MacOS
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编辑器之前是否有其它报错 ：没有
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出现概率：我的工程下当前操作100%触发，已经无法继续进行动画编辑。
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额外线索：