复制的web工程为什么不能部署到tomcat

An existing resource has been found at location D:apache-tomcat-6.0.18apache-tomcat-6.0.18webappsday03.
Deployment of project day04 will replace this resource. Please specify the action you wish to take during deployment:

在web过程上右键，然后选择properties,然后找到web，选择工程名的root修改之后就可以重新部署了！