Issues with Pacman - keeps failing in the past few months

I am having issues updating my Artix (Arch based) Linux. I use these commands to get the latest mirror list and launch pacman: % sudo pacman -U ./artix-mirrorlist-20221209-1-any.pkg.tar.zst % sudo mv /etc/pacman.d/mirrorlist.pacnew /etc/pacman.d/mirrorlist % sudo pacman -Sy --needed archlinux-keyring % sudo pacman -Syyu This always worked successfully in the past, but in the last few months this is the output I get: 100 100k 100 100k 0 0 401k 0 --:--:-- --:--:-- --:--:-- 402k % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 471k 100 471k 0 0 1366k 0 --:--:-- --:--:-- --:--:-- 1370k % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 40781 100 40781 0 0 188k 0 --:--:-- --:--:-- --:--:-- 188k % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 119k 100 119k 0 0 447k 0 --:--:-- --:--:-- --:--:-- 449k % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 3975k 100 3975k 0 0 803k 0 0:00:04 0:00:04 --:--:-- 649k % Total % Received % Xferd Average Speed Time Time Time Current .... and it keeps going on like that for a long time. Then this is what I am asked for: 100 3040k 100 3040k 0 0 4355k 0 --:--:-- --:--:-- --:--:-- 4355k % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 52477 100 52477 0 0 249k 0 --:--:-- --:--:-- --:--:-- 251k % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 237k 100 237k 0 0 817k 0 --:--:-- --:--:-- --:--:-- 819k Total ( 0/1193) 1969.9 MiB 482 KiB/s 69:44 [----------------------------------------------------------------------------] 100% (1193/1193) checking keys in keyring [----------------------------------------------------------------------------] 100% (1193/1193) checking package integrity [----------------------------------------------------------------------------] 100% error: archlinux-keyring: signature from "Dudemanguy " is unknown trust :: File /var/cache/pacman/pkg/archlinux-keyring-20220927-1.1-any.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)). Do you want to delete it? [Y/n] Y error: coin: signature from "Alexander F. Rødseth " is marginal trust :: File /var/cache/pacman/pkg/coin-4.0.0.04c190-4-x86_64.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)). Do you want to delete it? [Y/n] n error: med-openmpi: signature from "Alexander F. Rødseth " is marginal trust :: File /var/cache/pacman/pkg/med-openmpi-4.1.1-2-x86_64.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)). Do you want to delete it? [Y/n] n error: python-pivy: signature from "Alexander F. Rødseth " is marginal trust :: File /var/cache/pacman/pkg/python-pivy-0.6.8-1-x86_64.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)). Do you want to delete it? [Y/n] n error: libreoffice-fresh: signature from "Dudemanguy " is unknown trust :: File /var/cache/pacman/pkg/libreoffice-fresh-7.4.1-3-x86_64.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)). Do you want to delete it? [Y/n] n error: failed to commit transaction (invalid or corrupted package) Errors occurred, no packages were upgraded. I tried giving different answers to those questions, but the result is always the same. What am I doing wrong?