{

    "stock_name":"8折优惠券",

    "belong_merchant":"1267388801",

    "available_begin_time":"2020-07-07T17:03:24+08:00",

    "available_end_time":"2020-08-06T17:03:24+08:00",

    "stock_use_rule":{

        "max_coupons":10,

        "max_amount":5000,

        "max_coupons_per_user":10,

        "natural_person_limit":true,

        "prevent_api_abuse":true

    },

    "pattern_info":{

        "description":"本优惠券不可兑换现金，不可找零。",

        "merchant_logo":"http://open.liantuobank.cn/imgPath/club-open/1594109222326.jpg",

        "merchant_name":"分分蛋糕11",

        "background_color":"#63b359",

        "coupon_image":""

    },

    "coupon_use_rule":{

        "coupon_available_time":{

            "second_day_available":false,

            "available_time_after_receive":1440

        },

        "disscount_coupon":{

            "discount_amount_max":500,

            "discount_percent":80,

            "transaction_minimum":2000

        },

        "available_merchants":[            "1267388801"]

    },

    "no_cash":true,

    "stock_type":"DISCOUNT",

    "out_request_no":"1594112544722"

}

{"code":"MCH_NOT_EXISTS","message":"商户信息查询失败"}

请问是什么原因呢