Okla. Stat. tit. 58, § 58-64: Hearing and judgment - New will, admitting to probate

At the time appointed for showing cause, or at any time to which

the hearing is postponed, personal service of the citations having

been made upon the persons named therein, and the required

publication, posting and service of the notices having been made,

and all duly proved, the court must proceed to try the issues joined

in the same manner as in an original contest of a will. If upon

hearing the proofs of the parties the court shall decide that the

will is, for any of the reasons alleged, invalid, or that it is not

proved to be the last will of the testator, the probate must be

annulled and revoked; and if the court shall decide that the new

will is valid, it may admit the same to probate in the same manner

as originally upon the probate of a contested will.