Should any change in the records result in any member, beneficiary, or retirant receiving from the retirement system more or less than he would have been entitled to receive had the records been correct, the Board shall correct the error, and as far as practicable shall adjust the payment in such a manner that the actuarial equivalent of the benefit to which the member, beneficiary, or retirant was correctly entitled shall be paid.
(‘83 Code, § 36.59)