OME suddenly reporting an Authentication Error for a server that's been up for months

Hi,

We have a server that's been up and running for many months.  A few hours ago it suddenly is sending out Authentication Errors through OME.  The Authentication checkbox is NOT checked in SNMP on the server and it never has been.  Nothing has changed on the server itself and I have rebooted the server and still get the error.

Is there any information on what this error might mean and why it just started happening?

Thanks.