Help Need for Changing DOB in 10+2 (UP Board)

Hi Guys, Need some guidance how Can I change my DOB in 10+2 Marksheet (UP Board) after 5 years. I passed 12th in 2019 and on that time I didn't have a birth certificate. The person who made my Birth Certificate gave us after 10-15 years. Now I noticed that there is 3 years diffrence in both Certificate. I'm preparing for govt job so it's really concerning for me. Please guide me with it.