Arch Linux

sudo pacman -Syu linux-firmware                                                                                  ✘ 1   5s  21:58:38
error: cachyos: signature from "CachyOS <admin@cachyos.org>" is invalid
:: Synchronizing package databases...
 cachyos-v3 is up to date
 cachyos-core-v3 is up to date
 cachyos-extra-v3 is up to date
 cachyos                                                     499.6 KiB   385 KiB/s 00:01 [---------------------------------------------------] 100%
 core is up to date
 extra is up to date
 multilib is up to date
error: cachyos: signature from "CachyOS <admin@cachyos.org>" is invalid
error: failed to synchronize all databases (unexpected error)