Clear Snapshot Too Old due to Rollback Segment Limit alert from home page
We are using OEM Database Control 11g (comes as part of the database). There is an old alert for 'Snapshot Too Old due to Rollback Segment Limit' that is dated Mar.13, 2014 (serveral days old). We know why the error occured and just want to clear the alert from the home page. I know how to clear alerts by disabling and enabling or clearing and re-establishing the threshold, but I can't find a matching metric for this alert. Anyone know how to clear this from the home page? Thanks.