I don’t know what I’ve done when I want to upgrade android studio on my apricity box. The error is clear :
error: could not open file /var/lib/pacman/sync/apricity-core.db: Unrecognized archive format
The solution actually easy 🙂
# rm -R /var/lib/pacman/sync/
# pacman -Syuf
save and still see error 🙂
Well, all solved after follow this guide carefully.