The tag is present in Lintian version 2.104.234. That is the most recent version we know about.
The watch file specifies an upstream version which exactly matches
the version of a
debian/changelog entry, this is not a
native package, and no version mangling is being done. The version
field in a watch file should specify the expected upstream version, not
the version of the Debian package. Any epochs and Debian revisions
should be removed first or mangled away.
Refer to the uscan(1) manual page for details.