Should any member, survivor or beneficiary receive a benefit from the Retirement System more or less than such person is entitled to receive, the Board, on the discovery of any such error, regardless of the intentional or unintentional nature of the error, shall correct such error and, so far as practicable, shall adjust the payments which may be made for and to such person in such a manner that the actuarial equivalent of the benefit to which the person was entitled shall be paid. The Board shall also be authorized to recover any excess payment including the right to make deductions from future benefits.