Lintian tag information: inconsistent-appstream-metadata-license (type: warning)

Description (from lintian-explain-tags)

The specified AppStream metadata file specifies a metadata_license field
but this does not match its entry (possibly via the Files: * stanza) in
debian/copyright.

Please refer to https://wiki.debian.org/AppStream/Guidelines,
https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/, and
https://www.freedesktop.org/software/appstream/docs/chap-Metadata.html#tag-metadata_license
for details.

Visibility: warning
Show-Always: no
Check: debian/copyright/dep5

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