Mint-l-theme 1.9.5-2 not found

Hello all,
when I try to update my Manjaro it fails since a few weeks with:
Target not found: mint-l-theme

It seems that this package is not installed on my system yet. I’m wondering why it should be updated ?

Update your mirrors first.

how can I update the mirrors ?

I renamed/removed the folder /usr/share/themes/Mint-L/

After that I tried the update again and it was working.

sudo pacman-mirrors -f 5 && sudo pacman -Syyu