Okla. Stat. tit. 12, § 12-1187: Action by defendant against garnishee

No action shall be commenced by the defendant or his assignee

against a garnishee upon any claim or demand liable to garnishment,

or to recover any property garnished, or execution be issued upon a

judgment in favor of defendant against such garnishee subsequent to

the service of the garnishee summons upon him, until the termination

of the garnishee action; and if an action shall have been commenced

or an execution issued, it shall be stayed by the court or a judge

thereof, upon the garnishee's application; except that upon cause

shown, the court or a judge may by order permit the commencement of

such an action, or the issue of an execution, or the further

prosecution of one stayed.