I have this too, and don’t know why as i uninstalled/removed kernel 6.0 back when i installed 6.1, so very confused at this problem.
Even trying:
mhwd-kernel --remove linux60
Reports:
Found the problem for Kernel 6.0, In “etc/mkinitcpio.d/” i had “linux60.preset” which should not be, it should of been “linux60.present.pacsave” as it was uninstalled.
So renamed to *.pacsave and run “sudo mkinitcpio -P” from terminal and “sudo update-grub” and the Kernel 6.0 error has gone.
Also if you are using ckb-next (Corsair driver/RGB animations) from AUR you will need to rebuild with this update.