The tag is present in Lintian version 2.104.244. That is the most recent version we know about.
The package uses the emacsen-common infrastructure but the package was not built with dh-elpa. Please consider transitioning the package build to use dh-elpa, unless the package is required to work with XEmacs.
dh-elpa centralises the emacsen-common maintscripts, which makes for fewer bugs, and significantly easier cross-archive updates to emacsen packages.
In addition, a package built with dh-elpa integrates with the GNU Emacs package manager, for a better user experience.
Refer to the dh_elpa(1) manual page, the dh-make-elpa(1) manual page, and https://wiki.debian.org/Teams/DebianEmacsenTeam/elpa-hello for details.