同一个商户号下面有两个appid（A, B)，A在支付签约接口返回正常，B在支付签约接口返回错误，如下所示（已隐藏掉appid等参数）。B正常请求预支付没问题。B是在该商户号已申请委托代扣之后才绑定到该商户号的。代扣模板id也是在B加入该商户号之前申请的。
请求参数：
<xml>
<appid><![CDATA[****]]></appid>
<body><![CDATA[连续包月]]></body>
<contract_appid><![CDATA[****]]></contract_appid>
<contract_code><![CDATA[1233990201904111053020b7c6634ac9]]></contract_code>
<contract_display_account><![CDATA[******]]></contract_display_account>
<contract_mchid>*****</contract_mchid>
<contract_notify_url><![CDATA[https://******/wxpay/contract/sign]]></contract_notify_url>
<mch_id>*****</mch_id>
<nonce_str><![CDATA[q6yr3cvgd3kdsitoahrjkgc5ek2ftsme]]></nonce_str>
<notify_url><![CDATA[https://******/wxpay/notify]]></notify_url>
<out_trade_no><![CDATA[1000700201904111053020bd16634ac4]]></out_trade_no>
<plan_id>123399</plan_id>
<request_serial>91</request_serial>
<sign_type><![CDATA[MD5]]></sign_type>
<spbill_create_ip><![CDATA[*****]]></spbill_create_ip>
<time_expire>20190411110302</time_expire>
<time_start>20190411105302</time_start>
<total_fee>12800</total_fee>
<trade_type><![CDATA[APP]]></trade_type>
<sign><![CDATA[EB686C97FD7FBD012A29035B53D13070]]></sign>
</xml>
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返回结果：
{
"appid":"****",
"contract_err_code":"SYSTEMERROR",
"contract_err_code_des":"system error",
"contract_result_code":"FAIL",
"mch_id":"****",
"nonce_str":"5AXg58lcSA5sI3n2",
"prepay_id":"wx111053027459634030d9db92142*****",
"result_code":"SUCCESS",
"return_code":"SUCCESS",
"return_msg":"OK",
"sign":"FAC30FE821ACA1FF60EBF2FDF8ACA501",
"trade_type":"APP"
}
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相似问题未解决
https://developers.weixin.qq.com/community/develop/doc/000c620a6dcd58af07683f2a952800?highLine=%25E7%25AD%25BE%25E7%25BA%25A6
https://developers.weixin.qq.com/community/develop/doc/0004c2ff4942c8aad2e78b21456400?highLine=%25E7%25AD%25BE%25E7%25BA%25A6
