In Washington, the temp. order would be valid until superseded by a new order, final or temporary. The exception to this would be if there were an automatic sunset clause. For example, the order shall expire when the child turns 15, or whatever.
I would need more info to give you a more complete answer.
I am admitted to practice in NY and WA. Your order was entered in NY. The duration of the temporary order depends on the language of the order. You should ask an attorney to review the order and give you an opinion.