Hi
It seems the key expired again:
pub rsa2048 2017-09-30 [SC] [expirée : 2023-11-09]
2E98 F7B5 A5B2 C8FE 7F60 9705 D1F9 33E6 D836 1F81
uid [ expirée ] home:uibmz:opsi OBS Project <home:uibmz:
opsi@build.opensuse.org>
The key isn't up to date on
https://keyserver.ubuntu.com/.