Cannot upgrade/downgrade to Dynamic Web Module 3.0 facet. It is incompatibile with already installed

maven項目報錯 Cannot upgrade/downgrade to Dynamic Web Module 3.0 facet. It is incompatibile with already installed facets: Java 1.5. Please modify project configuration. 找了很多網上的解決方法都沒解決 有的修改.setting文件裏面的東

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