推送小程序订阅消息时出现47003错误，不知道是什么原因？

【请求参数】：{"touser":"touser","template_id":"template_id","miniprogram_state":"formal","lang":"zh_CN","data":{"car_number5.DATA":{"value":"浙66666"},"thing6.DATA":{"value":"上门服务订单"},"date7.DATA":{"value":"2020年07月03日 09:00"},"thing4.DATA":{"value":"下单成功，请耐心等待洗车工接单。"},"thing8.DATA":{"value":"北京市北京市东城区"}}}

{"errcode":47003,"errmsg":"argument invalid! hint: [bIadIlnre-ZxArDA] data.thing6.value is emtpy"}