Hello, what I would do is, I would do some swap test, (B4 B6 to A4 A6) and see the messages follow the memory. Then the memory would be the issue.

hello Please swap the memory modules or test them one by one.

For context, memory training is this: https://www.dell.com/support/kbdoc/en-us/000053203/what-is-ddr4-self-healing-on-dell-poweredge-servers-with-intel-xeon-scalable-processors. So it's kinda important to get it resolved. Do what the other guys say and swap and test to narrow the scope of the problem.