Problem with pacman (database is incorrect version: /var/lib/pacman/) how to solve?

Question

linux

I install a minimal system arch linux
when installing grub :
arch-chroot /mnt pacman -S grub-bios
swears by the following:

error:failed to initialize alpm library
(database is incorrect version: /var/lib/pacman/)
error: try running pacman-db-upgrade

tried
pacman-db-upgrade

pacman-key --init
pacman-key --populate msys2
pacman-key --refresh-keys

does not help, swears:

==>ERROR: The keying file /usr/share/pacman/keyrings/msys2.gpg does not exist

==>ERROR: A specified local key could not be upgrade from keyserver

Answer 1

you mixed warm with soft)
your problem is not with pacman, but with the keys
with pacman you did everything right, it was recently updated and the version on the installer did not match the current one
, this should be enough
, but with the keys you have done something
there should only be :

pacman-key --init
pacman-key --populate archlinux

Answer 2

pacman-db-upgrade
pacman-key --init
pacman-key --populate archlinux
pacman-key --refresh-keys