All reports of binary-control-field-duplicates-source for the archive. The extended description of this tag is:

In debian/control, this field for a binary package duplicates the value inherited from the source package paragraph. This doesn't hurt anything, but you may want to take advantage of the inheritance and set the value in only one place. It prevents missing duplicate places that need to be fixed if the value ever changes.

Severity: wishlist, Certainty: certain

Check: control-file, Type: source

This tag has not been emitted in any package tested by Lintian.