Lintian warning inconsistent-appstream-metadata-license

[Rafael Laboissière <rafael@debian.org>]

Lintian is raising the warning inconsistent-appstream-metadata-license 
against many packages of the DOG. [*]

Does anyone know how to fix this ?

Rafael

[*] https://lintian.debian.org/maintainer/team+pkg-octave-team@tracker.debian.org.html#octave-doctest