PowerEdge R7525. The System Configuration Check operation resulted in the following issue: Comm Error: Riser 1.

Hi

I have four identical R7525 server. Few days ago I updated the iDRAC FW to version 7.00.60.00. (Before it was 6.10.30.00) 

Direct after the FW update I recived on all four server the same errors:
- The System Configuration Check operation resulted in multiple Riser issues.

- The System Configuration Check operation resulted in the following issue: Comm Error: Riser 1.

I can't imagine all server have a real HW problem.
What can we do to solve this?

Regards

Peter