在 CentOS 6 上运行时：
yum update
我接受它提供的交易摘要，然后立即收到以下信息：
Downloading Packages:
warning: rpmts_HdrFromFdno: Header V3 RSA/SHA1 Signature, key ID 4520afa9: NOKEY
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY.art.txt
The GPG keys listed for the "CentOS / Red Hat Enterprise Linux 6 - atomicrocketturtle.com" repository are already installed but they are not correct for this package.
Check that the correct key URLs are configured for this repository.
我该如何解决这个问题？
当我运行这个：
rpm -q --queryformat "%{SUMMARY}\n" gpg-pubkey
我得到这个回应：
gpg(CentOS-6 Key (CentOS 6 Official Signing Key) <centos-6-key@centos.org>)
gpg(EPEL (6) <epel@fedoraproject.org>) …