使用 pacman 更新时出错

今天运行 pacman -Syu 发生了这个错误：

(627/627) checking package integrity                                                                                                           \[########################################################################################\] 100%

error: libspeechd: signature from "Alexander Epaneshnikov <[[email protected]](mailto:[email protected])\>" is unknown trust

:: File /var/cache/pacman/pkg/libspeechd-0.11.1-2-x86\_64.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)).

Do you want to delete it? \[Y/n\] n

error: mujs: signature from "Daniel Bermond <[[email protected]](mailto:[email protected])\>" is marginal trust

:: File /var/cache/pacman/pkg/mujs-1.2.0-2-x86\_64.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)).

Do you want to delete it? \[Y/n\] n

error: speech-dispatcher: signature from "Alexander Epaneshnikov <[[email protected]](mailto:[email protected])\>" is unknown trust

:: File /var/cache/pacman/pkg/speech-dispatcher-0.11.1-2-x86\_64.pkg.tar.zst 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)

Errors occurred, no packages were upgraded.

 \-> error installing repo packages

Arch 版本：

5.10.87-1-lts

侏儒

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我能做些什么来解决这个问题？