This keeps me from updating anything at the moment…
I think this is a problem with my configs, because I recently had a problem where updating with yay resulted in it building my installed kernel itself and my installed packages being newer than the ones found by yay or pacman. I had to edit my /etc/pacman.conf to include the cachyos repositories to fix this. (I believe this problem was caused by me overriding /etc/pacman.conf while using pacdiff)
I pretty much just added this to the end:
[cachyos-v3]
Include = /etc/pacman.d/cachyos-v3-mirrorlist
[cachyos-core-v3]
Include = /etc/pacman.d/cachyos-v3-mirrorlist
[cachyos-extra-v3]
Include = /etc/pacman.d/cachyos-v3-mirrorlist
[cachyos]
Include = /etc/pacman.d/cachyos-mirrorlist
I also ran sudo pacman -Syyu and cachyos-rate-mirrors without success.