VLT0304 CPU 2 VSA PG voltage is outside of range. Reseat CPU PowerEdge R820

We received this error its looks like a while ago and it wasn't caught as it has not caused any crashes or iDRAC issues or anything of the sort. We did catch a failing power supply on this server and just replaced that. The technician brought this error to our attention. How critical is this error and could the replaced power supply have fixed it? Currently all of our CPU are green on the iDRAC. This is a production system and we would like to avoid having to bring it down.