I always get the following error when running Synaptic: W: GPG error: http://debian.linuxmint.com testing Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 07DC563D1F41B907
Here are my sources:
deb http://packages.linuxmint.com/ debian upstream import main
deb-src http://packages.linuxmint.com/ debian upstream import main #Added by software-properties
deb http://debian.linuxmint.com/latest/security testing/updates main contrib non-free
deb http://debian.linuxmint.com/latest/multimedia testing main non-free
deb http://debian.linuxmint.com/latest testing main contrib non-free
deb-src http://debian.linuxmint.com/latest testing main contrib non-free
How do I correct this issue? What causes this?






