E doc-base-file-unknown-field

All reports of doc-base-file-unknown-field for the archive. The extended description of this tag is:

The doc-base control file contains field which is either unknown or not valid for the section where was found. Possible reasons for this error are: a typo in field name, missing empty line between control file sections, or an extra empty line separating sections.
Refer to Debian doc-base Manual section 2.3.2.1 (The main section) and Debian doc-base Manual section 2.3.2.2 (Format sections) for details.
Severity: important, Certainty: certain

The package names link to the relevant maintainer page and the corresponding report for the source package. The links go to the full maintainer report page, which includes info and experimental tags and overridden tags, rather than the default page that shows only errors and warnings.