On a server I don't use very often, I am trying to update mock-core-configs with yum and I am seeing:

Resolving Dependencies
--> Running transaction check
---> Package mock-core-configs.noarch 0:36.9-1.el7 will be updated
---> Package mock-core-configs.noarch 0:36.13-1.el7 will be an update
--> Processing Dependency: distribution-gpg-keys >= 1.77 for package: mock-core-configs-36.13-1.el7.noarch
--> Finished Dependency Resolution
Error: Package: mock-core-configs-36.13-1.el7.noarch (epel-unverified)
           Requires: distribution-gpg-keys >= 1.77
           Installed: distribution-gpg-keys-1.75-1.el7.noarch (@epel-unverified)
               distribution-gpg-keys = 1.75-1.el7
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest

On another server I regularly use and update I have distribution-gpg-keys-1.77-1.el7.noarch which I updated to a while back, so it appears that the updated package has been removed? Obviously this then breaks updating mock-core-configs. If distribution-gpg-keys-1.77-1.el7.noarch was a bad release, perhaps 1.75 should be bumped to a later version so it gets installed over 1.77 rather than just removing the package?

Regards,

Nick