The [community] repo has been deprecated for some time and should be removed.
This would have been shown through a pacnew.
Specifically /etc/pacman.conf.pacnew
You may print all your pacnews with
pacdiff -o
For the purposes here, of this single question …
Yes you remove the entry. If you want to be extra careful you can comment it out.
Then
sudo pacman -Sc
(yes to removing unused repos)
Then sync+upgrade again
sudo pacman -Syu