Hi Adam, This bug can remain archive, there is no need to unarchive and the maintainer himself has the choice to keep or not a package that is his. And it seems to me that he chose to keep it even though he has 1 package out of testing and present in unstable used as build-dep outdated since 2008. I chose insert -ignore exactly because this bug does not affect stretch. But I didn't know that it can only be used by the release team (something not mentioned in the documentation I've read about debbugs [1]).
[1] https://www.debian.org/Bugs/server-control -- Cheers, Leandro Cunha