请求参数

{"stock_type":"NORMAL","coupon_use_rule":{"available_merchants":["0000000"],"fixed_normal_coupon":{"coupon_amount":1000,"transaction_minimum":1001}},"no_cash":true,"stock_use_rule":{"prevent_api_abuse":true,"natural_person_limit":true,"max_amount":1000,"max_coupons_per_user":10,"max_coupons":10},"stock_name":"微信支付代金券批次1","available_end_time":"2022-05-18T15:40:35.120+08:00","comment":"所属活动","belong_merchant":"0000000","out_request_no":"161887650520220418151728","available_begin_time":"2022-04-18T15:40:35.120+08:00"}

返回参数

响应码 = 400,返回数据 = {"code":"PARAM_ERROR","message":"批次预算等于批次面额乘以发券数"}

是我的批次预算数值错了吗，我看到一个帖子一样是返回 批次预算等于批次面额乘以发券数 ，但那个帖子是json格式错误，我的参数是通过Gson工具包转的map，应该不会是格式错误，请问一下是哪里的问题