I faced with a strange problem about aur and pacman. when i try aur sync or pacman -Syu I get
error: signature from "Internal email" is invalid error: failed to synchronize all databases (invalid or corrupted database (PGP signature))
( i have to mention the pgp signature is not from archlinux its from a private one which i use it for sign database with) (it not expired and it's exist completly fine)
i already tried rm /var/cach/pacman/sync/*.db.sig file. it is work for pacman but as soon as i run aur sync the error comes up again. beside that it seems that i can't sign any package with this signature.
i tried to delete and re add it too.didn't help.
i would appriciate if you can help me with that.