Okla. Stat. tit. 58, § 556

The settlement of the account and the allowance thereof by the court, or upon appeal, is conclusive against all persons in any way interested in the estate, saving, however, to all persons laboring under any legal disability, their right to move for cause to reopen and examine the account, or to proceed by action against the executor or administrator, either individually or upon his bond, at any time before final distribution; and in any action brought by any such person, the allowance and settlement of such account is prima facie evidence of its correctness.