Uninstalled a package, but keep getting signature errors and cannot update system

I installed sublime-text, which I then uninstalled. To check: > sudo pactree sublime-text error: package 'sublime-text' not found > sudo pactree -r sublime-text error: package 'sublime-text' not found Now I want to update my system: > sudo pacman -Syu error: sublime-text: signature from "Sublime HQ Pty Ltd " is unknown trust :: Synchronizing package databases... system is up to date world is up to date galaxy is up to date lib32 is up to date universe is up to date omniverse is up to date extra is up to date community is up to date multilib is up to date sublime-text 1837.0 B 4.30 KiB/s 00:00 [----------------------------------------------------------------------------] 100% error: sublime-text: signature from "Sublime HQ Pty Ltd " is unknown trust error: failed to synchronize all databases (invalid or corrupted database (PGP signature)) It looks like there is still something left of sublime-text that does not allow me to proceed. How can I completely clean up my system from this package?