I went to a CA. DMV office to renew my license. A DUI charge from 1988 in AZ. showed up, what do I do? ?

I had a DUI in Arizona in 1988, I went in to a DMV office here in California. As the person was ready to renew my license, she found this old DUI offense on her computer and would not renew my license until I dealt with it with the Arizona DMV, isn't there a statute of limitation that should have erased that 1988 DUI???? I need to drive.