The tag is present in Lintian version 2.104.328. That is the most recent version we know about.
The package appears to be a web application but declares a package
apache2-data or any of its
transitional packages. However, web applications are rarely bound to a specific
web server version. Thus, they should depend on
apache2 only instead.
If a web application is actually tied to a particular binary version of the web
server a dependency against the virtual
is more appropriate.