Manjaro: failed to commit transaction (invalid or corrupted package (PGP signature))

I obtain this error:

sudo pacman -Syu
:: Synchronizing package databases...
 core is up to date
 extra is up to date
 community is up to date
 multilib is up to date
:: Starting full system upgrade...
resolving dependencies...
looking for conflicting packages...

Packages (2) chromium-126.0.6478.126-1  discord-0.0.58-1

Total Download Size:   175,48 MiB
Total Installed Size:  571,13 MiB
Net Upgrade Size:        4,13 MiB

:: Proceed with installation? [Y/n] 
:: Retrieving packages...
 chromium-126.0.6...    99,9 MiB  4,41 MiB/s 00:23 [######################] 100%
 discord-0.0.58-1...    75,5 MiB  3,85 MiB/s 00:20 [######################] 100%
 Total (2/2)           175,5 MiB  4,14 MiB/s 00:42 [######################] 100%
(2/2) checking keys in keyring                     [######################] 100%
(2/2) checking package integrity                   [######################] 100%
error: chromium: signature from "Evangelos Foutras <foutrelis@archlinux.org>" is unknown trust
:: File /var/cache/pacman/pkg/chromium-126.0.6478.126-1-x86_64.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] 
error: discord: signature from "T.J. Townsend <blakkheim@archlinux.org>" is unknown trust
:: File /var/cache/pacman/pkg/discord-0.0.58-1-x86_64.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] 
error: failed to commit transaction (invalid or corrupted package (PGP signature))
Errors occurred, no packages were upgraded.

I try all the methods in this forum but I can’t solve this problem.

I try using this command:

sudo pacman -S archlinux-keyring
warning: archlinux-keyring-20240609-1 is up to date -- reinstalling
resolving dependencies...
looking for conflicting packages...

Packages (1) archlinux-keyring-20240609-1

Total Download Size:   1,17 MiB
Total Installed Size:  1,66 MiB

:: Proceed with installation? [Y/n] y
:: Retrieving packages...
 archlinux-keyrin...  1193,9 KiB  2,05 MiB/s 00:01 [######################] 100%
(1/1) checking keys in keyring                     [######################] 100%
(1/1) checking package integrity                   [######################] 100%
error: archlinux-keyring: signature from "Christian Hesse <eworm@archlinux.org>" is unknown trust
:: File /var/cache/pacman/pkg/archlinux-keyring-20240609-1-any.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] 
error: failed to commit transaction (invalid or corrupted package (PGP signature))
Errors occurred, no packages were upgraded.

but not works. Please Help me.

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