All reports of unknown-essential-value for the archive. The extended description of this tag is:
The only valid values for the Essential field are yes and no.
Refer to Debian Policy Manual section 5.6.9 (
Essential) for details.
Severity: important, Certainty: certain
Check: fields/essential, Type: binary, udeb, source
This tag has not been emitted in any package tested by Lintian.