无论是多次提交还是用相同参数提交都是返回这个错误

最终请求参数是

<xml><mch_id>商户号</mch_id><sub_mch_id>子商户号</sub_mch_id><appid>appid</appid><sub_appid>子商户appid</sub_appid><transaction_id>4200000354201908072225449063</transaction_id><out_order_no>20190807135202156515712247086</out_order_no><nonce_str>7WlsmOyjT13q28AJRCrOe2Rd4tdIZEfl</nonce_str><receivers>[{"type":"PERSONAL_SUB_OPENID","account":"ox2uL5SaHSouMKDGoCO1EuPczeNA","amount":2,"description":"分到商户"}]</receivers><sign_type>HMAC-SHA256</sign_type><sign>9F53114223A6D3AC7E35197A32048534704B14199DDD24B081606A22A8DC6B0C</sign></xml>

接收方的openid是对应子商户appid 的。之前也添加过分账接收方了