Originally Posted by D@vIcHoJD

Running update again does of course not help and will give you the same error again.

Trying to import the key with:

Code:

sudo gainroot

(xxx Is the number public key - pubkey)

Code:

gpg --keyserver subkeys.pgp.net --recv-keys XXXXXXXXXXXXXXX

Code:

gpg --export --armor "XXXXXXXXXX" | apt-key add -

Code:

apt-get update

That is all

I correct this error in this way when I had this problem.