[Bug Report] el-tree叶子节点A拖拽到另一个叶子节点B里后,B无法添加子节点,A无法被删除
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- Dominant language
- Vue
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Description
### Element UI version
2.15.9
### OS/Browsers version
macos@12.5.1 / chrome@105.0.5195.125
### Vue version
2.6.12
### Reproduction Link
https://codepen.io/Zhuozi-Zou/pen/BaxgMKb
### Steps to reproduce
打开上面的Reproduction Link后:
1. 将叶子节点A拖拽到另一个叶子节点B里面
2. 点击B右侧的Append,无法添加子节点
3. 点击A右侧的Delete,无法删除A
### What is Expected?
节点A、B经过拖拽后能正常append、delete
### What is actually happening?
B无法append,A无法delete
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