The tag is present in Lintian version 2.104.319. That is the most recent version we know about.
debian/changelog is a symlink instead of a regular
file. This is unnecessary and makes package checking and manipulation
more difficult. If the changelog should be available in the source
package under multiple names, make
debian/changelog the real
file and the other names symlinks to it.
This problem may have prevented Lintian from performing other checks, leading to undetected changelog errors.