Copy messages with key

[aliSadegh]

Hi everyone
How can I copy a message from a topic to another topic with key?
my message in topic A in source has key like "somekey" and when I copy it to sink topic B, the key is empty
this is my connector configuration:
`{
"name": "copy-topic-001",
"config":
{
"schema.ignore": "true",
"value.converter.schemas.enable": "false",
"key.converter.schemas.enable": "false",
"key.converter": "org.apache.kafka.connect.storage.StringConverter",
"value.converter": "org.apache.kafka.connect.storage.StringConverter",

    "connector.class": "com.kakao.connector.kafka.KafkaSinkConnector",
    "kafka.key.enabled": true,
    "kafka.sink.bootstrap": "kafka:9092",
    "kafka.sink.topic": "test-inter-copy",
    "tasks.max": "1",
    "topics": "test-inter"
}

}`

and this is my message in source topic:
key: "001"
value:
{ "title": "some title" }