Parole is not the same thing as probation. If you were in fact on parole, that means you went to prison and which case you cannot get the case set aside pursuant to Penal Code § 1203.4. Sometimes people dont actually get sent to prison, but they do enough time in County Jail to do what is called a "paper" commitment. In other words the person has so much custody credit that even though they were "sent to prison", they actually left the front door of the County Jail. This is called a paper commitment.
If you did not go to prison you can petition the court to reduce per PC 17 and set aside per PC 1203.4, in that sequence.
The above information does not establish an attorney client relationship nor is it meant to provide legal advice.
To answer this repost I will assume that you were sentenced to prison since you stated you served more than one year and mention parole. You can only apply for a Certificate of Rehabilition which can:
Relieve some sex offenders, as specified, of further duty to register.
(Pen. Code § 290.5.)
• Enhance a felon’s potential for licensing
consideration by a State board. (Pen. Code § 4853.)
• Serve as an official document to demonstrate a felon’s rehabilitation, which could enhance employment possibilities.
• Serve as an automatic application for a gubernatorial pardon.
It will not erase the conviction but a pardon will.