What is this, and why does it cause my -Syu update to fail?

General system Newbie
2 
error: eos-translations: signature from “manuel <manuel@endeavouros.com>” is unknown trust
:: File /var/cache/pacman/pkg/eos-translations-26.5-1-any.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] y
error: eos-update: signature from “manuel <manuel@endeavouros.com>” is unknown trust
:: File /var/cache/pacman/pkg/eos-update-26.5.1-2-any.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] y
error: eos-reboot-recommended: signature from “manuel <manuel@endeavouros.com>” is unknown trust
:: File /var/cache/pacman/pkg/eos-reboot-recommended-26.5-2-any.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] y
error: failed to commit transaction (invalid or corrupted package)
Errors occurred, no packages were upgraded.

:green_heart: