$ sudo pacman -Syy archlinux-keyring archlinux32-keyring archlinuxarm-keyring parabola-keyring
:: Synchronizing package databases...
 libre                    312.7 KiB   408K/s 00:01 [######################] 100%
 core                     124.5 KiB   519K/s 00:00 [######################] 100%
 extra                   1447.5 KiB  1078K/s 00:01 [######################] 100%
 community                  5.6 MiB  1556K/s 00:04 [######################] 100%
 pcr                      526.2 KiB  1162K/s 00:00 [######################] 100%
warning: archlinuxarm-keyring-20140119-1 is up to date -- reinstalling
warning: parabola-keyring-20210723-1 is up to date -- reinstalling
resolving dependencies...
looking for conflicting packages...

Packages (4) archlinux-keyring-20210902-1  archlinux32-keyring-20210429-1.0
             archlinuxarm-keyring-20140119-1  parabola-keyring-20210723-1

Total Download Size:   1.09 MiB
Total Installed Size:  1.58 MiB
Net Upgrade Size:      0.44 MiB

:: Proceed with installation? [Y/n] y
:: Retrieving packages...
 archlinux32-keyring...    33.4 KiB   208K/s 00:00 [######################] 100%
 archlinuxarm-keyrin...    13.3 KiB   107K/s 00:00 [######################] 100%
 parabola-keyring-20...    88.5 KiB   130K/s 00:01 [######################] 100%
 archlinux-keyring-2...   976.7 KiB   731K/s 00:01 [######################] 100%
(4/4) checking keys in keyring                     [######################] 100%
downloading required keys...
error: key "6D42BDD116E0068F" could not be looked up remotely
error: required key missing from keyring
error: failed to commit transaction (unexpected error)
Errors occurred, no packages were upgraded.