pspacek [1] filed a deletion request for knot-lts [2]:

Hello. Please delete package `knot-lts`, which is based on Knot DNS version abandoned by upstream.

Version 1.y is not supported since Feb 2017 (https://lists.nic.cz/pipermail/knot-dns- users/2017-February/001055.html) and contains security issues fixed only in later versions (https://www.cvedetails.com/cve/CVE-2017-11104/).

Thank you. Petr Špaček

[1] https://aur.archlinux.org/account/pspacek/ [2] https://aur.archlinux.org/pkgbase/knot-lts/