Indirectly referenced from required .class files

From command line, run "mvn clean install", you'll see project failed and you'll see artifacts in the logs that cause such a problem. After that, remove artifacts from .m2/repository, then maven update from eclipse.

To avoid jar collision, make sure you declare your dependency versions under the properties tag in the aggregate pom.xml, and use the property name as a placeholder throughout the project. For example 4.2.5.RELEASE in the parent pom, and then in the child modules just use ${spring.version} instead of 4.2.5.RELEASE. This way you can avoid having two different versions of the same library on the classpath.

Also it is recommended to be consistent with the version of spring dependencies. Use the same version for spring-core, spring-web etc.

If you are using maven, then you can use the maven enforcer plugin to ensure dependency convergence, and avoid further issues with transitive dependencies.