All reports of debian-watch-file-should-dversionmangle-not-uversionmangle for the archive. The extended description of this tag is:
The version of this package contains dfsg, ds, or debian, but a misleading upstream version mangling occurs in the debian/watch file. Since the dfsg string is not part of the upstream version and its addition is Debian-specific, the debian/watch file should use the dversionmangle option to remove, instead of adding in uversionmangle, the dfsg before comparing version numbers.
Refer to https://wiki.debian.org/DEHS for details.
This tag has not been emitted in any package tested by Lintian.