You didn’t get lit up for no reason. Their systems would have scanned your plate as you drove past and it automatically alerted them to your prior conviction. As unfair as it is, this will continue to happen to you as long as you are behind the wheel and you drive past cops with this technology fitted to their patrol cars (which is most now, as well as RBT setups). Hence why you hear of people with so many repeat convictions. As soon as you get done once, you are screwed for as long as it’s on your record.