Cannot update my laptop

I have tried multiple times and multiple ways to update my machine. I have a Lenovo T430 with an i5 Intel CPU.

Whenever I try to update with either pacman, pamac, or yay on the command line, I get the following message:

warning: could not fully load metadata for package accountsservice-22.08.8-1
error: failed to prepare transaction (invalid or corrupted package)
→ error installing repo packages

I do have my files backed up, so if I have to reinstall, it would be a pain, but I’ve done it before. I am wondering if there is a way to fix my computer and allow it to update without having to resort to a full wipe and reinstall. Thank you in advance for your help.

You probably just need to follow the instructions found here:

I tried following all the instructions in that tutorial, and it did not work unfortunately.

Remove the files in /var/lib/pacman/sync:
sudo rm -f /var/lib/pacman/sync/*
Update and sync your system:
sudo pacman -Syyu