RPM fusion key updating problem

[david walcroft]

Yum update this morning came up with this error:-

Downloading Packages:
warning: rpmts_HdrFromFdno: Header V3 RSA/SHA256 Signature, key ID 
952f3af8: NOKEY
Retrieving key from 
file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rpmfusion-nonfree-fedora-16-i386


GPG key retrieval failed: [Errno 14] Could not open/read 
file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rpmfusion-nonfree-fedora-16-i386
[david at reddwarf ~]$

How do I fix this error.

Thanks  david