Had the same thing on a Lenovo (IBM) x3650 M5.
For those curious, in vSphere 6.7 the navigation is:
Monitor > Tasks and Events > Hardware Health > SYSTEM EVENT LOG > RESET EVENT LOG
you need to run the below command to get that error or notification cleared. I found some thing on web and tried.
you can try these steps. It worked for me too. Thanks to this guy.