An aortic aneurysm is a general term for any swelling of the aorta, usually representing an underlying weakness in the wall of the aorta at that location.
The biggest concern is the risk of rupture, which causes severe pain and massive internal bleeding, and can be fatal.
A mild aortic root aneurysm does not sound severe. Please provide additional information so we can answer your question more accurately. It may also be helpful to discuss with your doctor.
Who knows? You haven't given us your age, sex, size, or aortic diameters.