Resolve – Arch Pacman Error – Arch Linux Package Manager

Error :

$ sudo pacman -Syu                                                     130 (01:59.904) < 07:38:10
:: Synchronizing package databases...
error: failed to update core (unable to lock database)
error: failed to update extra (unable to lock database)
error: failed to update community (unable to lock database)
error: failed to update multilib (unable to lock database)
error: failed to update archlinuxfr (unable to lock database)
error: failed to synchronize all databases

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Solution :

$ sudo rm /var/lib/pacman/db.lck