how to fill kafka key field?

[ageMLex2021]

Good day! How to fill kafka key field for OLR Destination Kafka? Why I need it? When you send message to kafka, it sended to partition. If you dont have filled key field, kafka cant send messages with same primary keys to one partition. If messages with same primary keys in different partition, I cant read kafka topic with parallel consumers without possibility miss order of update data. Yes, I know about OLR + debezium, but in my case debezium cant work propertly, beacase my DB source do bad message (it fill null for not nullable field) make debezium to crush. Yes, I know about I can reproduce data to new topic with key field filled, but data flow huge and why we can`t do it at first time?

[ageMLex2021]

sorry, It is not right git :)