The tag is present in Lintian version 2.104.318. That is the most recent version we know about.
Debian revisions should be stripped from versions in symbols files. Not doing so leads to dependencies unsatisfiable by backports (1.0-1~bpo << 1.0-1 while 1.0-1~bpo >= 1.0). If the Debian revision can't be stripped because the symbol really appeared between two specific Debian revisions, you should postfix the version with a single "~" (example: 1.0-3~ if the symbol appeared in 1.0-3).
This problem normally means that the symbols were added automatically by
dpkg-gensymbols. dpkg-gensymbols uses the full version number for the
dependency associated to any new symbol that it detects. The maintainer
must update the
debian/<package>.symbols file by adding
the new symbols with the corresponding upstream version.