Upgrading ArchLinux [ERROR: filesystem: /bin exists in filesystem]

I have recently created a droplet with the ArchLinux OS. I made the inicial set up with the instruccions in this tutorial: https://www.digitalocean.com/community/articles/initial-server-setup-with-arch-linux/ and all was fine. Then I just run sudo pacman -Syu to upgrade the packages and got an error.

Details:

(126/126) checking keys in keyring [#################] 100% downloading required keys… :: Import PGP key 4096R/753E0F1F, “Anatol Pomozov anatol.pomozov@gmail.com”, created: 2014-02-04? [Y/n] y (126/126) checking package integrity [#################] 100% (126/126) loading package files [#################] 100% (126/126) checking for file conflicts [#################] 100% error: failed to commit transaction (conflicting files) filesystem: /bin exists in filesystem filesystem: /sbin exists in filesystem filesystem: /usr/sbin exists in filesystem Errors occurred, no packages were upgraded.

I’d really appreciate some help!