The tag is present in Lintian version 2.104.328. That is the most recent version we know about.
The Homepage field for this package points to an uncanonical CRAN URL. Please update to use the current canonical URL instead. The canonical URL is recommended for use in publications, etc., will always redirect to current release version (or devel if package is not in release yet). For example, the link for the package "foo" should be: