Node related file conflicts

Getting a long list of file conflicts, all Node related (see excerpt of list of files below). How might I address this?

Pacman does have an overwrite option (see man page), but I’d use that with caution … make sure you have at least one backup first.

Never install node packages using sudo:

Ah, I see, this is good to know. Thank you for the guide. I shall adhere to this in the future.
Now, is there a way out of this, considering I have already installed Node packages using sudo, or is this a full reinstall scenario?

Best thing would be to uninstall all conflicting packages they way you installed them. With pacman, as @BG405 already pointed out, you can use --overwrite. Check manpage.