We forgive others but we forget to forgive ourselves hoping it is not important. If you pray without forgiving yourself of any error or mistake you might have made, your prayer will not be answered. If you refuse to forgive yourself, no one will forgive you.
The very first person that needs forgiveness is you. You are the best person to forgive yourself because if you cannot forgive yourself, you are putting yourself in prison. Be brave enough to forgive yourself. Therefore, it is very important to free yourself from any form of imprisonment so that your prayer can reach the throne of God.