Tomcat: wrong version of the project

It may happen sometimes when we need to have several branches/versions of one project, that when we deploy one to tomcat another one is actually referenced. In that case even though we deploy one version, in fact we get a reference to another version.
To check if this is the case we can go to $tomcat/conf/Catalina/localhost/.xml and see if the project name references another version. One simple solution to this problem is to rename/remove the mentioned file.