TL;DR : If you are a system administrator for infrastructure using X.509/PKI certificates, please check that your infrastructure doesn't depend on the following CA certificates to be trusted. Although their validity dates indicate they are still valid, they will be removed in upcoming software updates. If you depend on them, you are likely to experience failures. Talk to your CA and make sure you refresh affected certificates on your systems.
more here...........https://kuix.de/blog/index.php?entry=Cleanup-of-1024-bit-CA-certificates
more here...........https://kuix.de/blog/index.php?entry=Cleanup-of-1024-bit-CA-certificates