The tag is present in Lintian version 2.104.264. That is the most recent version we know about.
The Dm-Upload-Allowed field in this package is set to something other than "yes". The only standardized value for this field in the Debian GR is "yes" and other values (including capitalization variants) may not work as expected.
Refer to https://www.debian.org/vote/2007/vote_003 for details.