There are a couple of old topics about exists in filesystem and you didn’t let us know if you already searched for it, nor if you tried something if you did found something related.
Some more active members of the forum might consider it lazy just to post the error and no evidence that some investigation was done by the OP.
For future, might consider this:
So, in case you did not find the solution actually, for you “issue”, either go by
pamac update
or you go by
sudo pacman -Syyu --overwrite "*"