Error Message re Security Settings

Hello, I am new to Linux. Recently added few repositories for community and today started getting the following message:

Security Trust Relationship cannot be established with software source. Please check your security settings.

When I click on details it tells me

For repo /var/cache/zypp/raw/repo-sourceZusl0Z/suse/setup/descr/packages.DU.gz c2c47b2bea12224005074a4a1dff2abb66ec28f0 is requested but 0e90c879133dc4ac7b63acd021c0969cc24d00e6 was found!

Please advise…

I get this message as well. Any suggestions?