Unrecognised tag: 'snapshotPolicy'

问题：[WARNING] Unrecognised tag: 'snapshotPolicy' (position: START_TAG seen ...</layout>\n          <snapshotPolicy>... @286:27)  @ D:\maven-3.6.1\bin\..\conf\settings.xml,line 286,column 27

出错位置：

    <profile>
      
      id>jdk-1.7</>

      activation>
        jdk>1.7>
      repositoriesrepository>
          >jdk17name>Repository for JDK 1.7 buildsurl>http://www.myhost.com/maven/jdk17layout>default>
          <snapshotPolicy>always</snapshotPolicy>
        >
    >

解决方法，将该段替换为：

>nexus>
            activeByDefault>true>
                >Nexus>http://172.16.1.79:8082/repository/maven-public/>
 
                releases>
                    enabledupdatePolicy>alwayssnapshots>daily>

不要问我为什么，我也不知道。。。