Update issues.

Trying to update my daughters laptops and it keeps failing due to corrupt packages.

This was one of them.

error: libmfx: signature from "Daniel Bermond dbermond@archlinux.org" is marginal trust
:: File /var/cache/pacman/pkg/libmfx-23.2.2-6-x86_64.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)).

It asks if I want to delete them. Trying each option still causes the updates to fail.