`debian-changelog-file-missing-or-wrong-name`

Each Debian package (which provides a /usr/share/doc/pkg directory) must install a Debian changelog file in /usr/share/doc/pkg/changelog.Debian.gz

A common error is to name the Debian changelog like an upstream changelog (/usr/share/doc/pkg/changelog.gz); therefore, Lintian will apply further checks to such a file if it exists even after issuing this error.