[CentOS] key mismatch?

I get this message when I try to run yum update on my Centos 7 server. Could someone help me make sense of it and what to do about it.

warning: /var/cache/yum/x86_64/7/mariadb-main/packages/MariaDB-backup- 10.6.12-1.el7.centos.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID c74cd1d8: NOKEY Retrieving key from file:///etc/pki/rpm-gpg/MariaDB-Server-GPG-KEY

The GPG keys listed for the "MariaDB Server" repository are already installed but they are not correct for this package. Check that the correct key URLs are configured for this repository.

Failing package is: MariaDB-backup-10.6.12-1.el7.centos.x86_64 GPG Keys are configured as: file:///etc/pki/rpm-gpg/MariaDB-Server-GPG- KEY