是什么问题、该问题是怎么引起的？

重现步骤、期望结果、截图、代码

mvn install 后

实际结果、报错信息、截图

PS D:\ProgramSoftware\eclipse-workspace\jeesite-web> mvn install
[INFO] Scanning for projects...
[ERROR] [ERROR] Project 'com.jeesite:jeesite-web:5.3.0-SNAPSHOT' is duplicated in the reactor @
[ERROR] Project 'com.jeesite:jeesite-web:5.3.0-SNAPSHOT' is duplicated in the reactor -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/DuplicateProjectException

环境版本：

• JDK版本：1.8、
• 浏览器版本：Chrome xx、Firefox xx、IE xx
• 平台版本：JeeSite 5.3.0（pom.xml里查看）