anonym's key in reprepro keyring is outdated
reprepro@apt:~$ gpg -k anonym@
pub rsa4096 2012-08-21 [SC] [expired: 2021-09-23]
52B69F10A3B0785AD05AFB471D84CCF010CC5BC7
uid [ expired] anonym <anonym@riseup.net>
… while a new version is available at least to me.
I'll update it manually to unlock anonym's work.
cc @anonym