Legal Question in Criminal Law in California

You don't give us enough details such as the nature of the conviction and the punishment. I suggest that you sit down and have a conversation with an experienced criminal defense attorney. Most criminal defense attorneys will give you a free initial consultation.

Many courts have purged their old records, leaving only a memo as to what the conviction was. If so, there is no way for them to change anything, since they don't have the facts of the case to see if it needs 'correction'. Your word is not going to count. You need to consult with or hire counsel to review and check the reality of the situation, and give you advice on what can be done. If serious about hiring counsel to help in this, and if this is in SoCal courts, feel free to contact me.