Should any change or error in the records either through administrative error or fraud result in any member or beneficiary receiving from the system more or less than he would have been entitled to receive had the records been correct, the board shall correct such error and so far as practicable shall adjust the payment in such a manner that the actuarial equivalent of the benefit to which such member or beneficiary was correctly entitled, shall be paid.
La. Consolidated Public Retirement § 11:1737