Currently, the nonprism Icedove package provides a PGP signature error. Before that, I already updated my system through -Syyuu.

Here's the error:

error: icedove: signature from "bill-auger <bill-auger@peers.community>" is unknown trust
:: File /var/cache/pacman/pkg/icedove-1:68.9.0-1.parabola1.nonprism1-x86_64.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] n
error: failed to commit transaction (invalid or corrupted package (PGP signature))
Errors occurred, no packages were upgraded.