There is more than one web fragment with the same name: “spring”_ Web “. Error
software used: idea

Error location:

According to the error prompt, say there are duplicate modules, that is, find the duplicate module and delete it.

Solution:

In the upper right running setting of idea, open edit configuration – select your Tomcat server on the left – Deployment – select your component – Pencil Icon on the right – arts to see if there is any extra XXX explored (XXX is the project name)