All reports of dep5-file-paragraph-references-header-paragraph for the archive. The extended description of this tag is:
The Files paragraph uses a reference to a license which is only defined in the Header paragraph. The copyright specification requires that the Files paragraph either contains the full license itself or references a "stand-alone" License paragraph, and not the Header paragraph.
Refer to https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/ for details.
This tag has not been emitted in any package tested by Lintian.