Mysql5.7 - GPG KEY error

[Clive Gwyther]

I am trying to install MySQL5.7 on Redhat7.9 and have completed this many times successfully utilising the following for the repo:

yum localinstall https://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm

Now when I try and yum install I keep getting the following error:

The GPG keys listed for the "MySQL 5.7 Community Server" repository are already installed but they are not correct for this package.

Now, a workaround is to edit the repository and set the GPG Key check to 0 but that is not a good idea.

I have checked on google and have implimented a new "key" and tried again with the same errors occurring.

Can you let me know how to resolve this issue please?