Hello. Commit 60349d9b2bdc64f3cc97e8ad4b7f378a992a2327 Author: Kristian Fiskerstrand <k_f@gentoo.org> AuthorDate: Sun Jul 30 19:09:53 2017 +0200 Commit: Kristian Fiskerstrand <k_f@gentoo.org> CommitDate: Sun Jul 30 19:10:33 2017 +0200 app-crypt/gnupg: Cleanup old Package-Manager: Portage-2.3.6, Repoman-2.3.1 removed several versions including 2.1.20-r1, which was stable on several arches including amd64. Maybe removal was justified, but commit doesn't have any info.
This was fixed in https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=1e2d860dbb5f79e29478154749923beb4848f322 , and .21-r1 correctly removed in https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=7a81a81e2cabf13cf1d86037a0a66dc98a7d344a