iotdb无法写入无信号key的数据

各位好，
我是用版本iot版本1.1.0，
使用对齐方式消费kafka写入iotdb，发现如果字段不存在，则该条数据就查不到，程序也没任何错误
日志可以看到 org.apache.iotdb.session.Session - All values are null and this submission is ignored

比如：
{
"uuid": "10001",
"GnsAlt": "5.0",
"Longtude": "119.317833",
"GPSts": "3"
"event_time": "2023-10-26 15:45:40"
}
uuid为设备，GnssAlt Longitude GPSSts 三个为信号值，event_time为事件事件，
如果正常传入这样的json，iotdb能正常写入，正常查询。
但是如果传入不带任何一个信号，但是有设备名称，事件时间如下：
{
"uuid": "10002",
"event_time": "2023-10-26 15:45:40"
}
iotdb不报错，但是查询不到10002设备的数据，
请问这样是否正常？按我理解获取不到信号key，希望存入null的。

Start by reproducing the aligned Kafka ingestion case in IoTDB 1.1.0 with a device and event_time but no signal fields, then inspect the reported Session log message: “All values are null and this submission is ignored.” Compare the result with a submission containing signal values and query both devices. Done should establish whether this behavior is expected and, if not, define the intended handling and add a regression test.

Written by the indexing model from the issue text.