There's one thing that's a common use case, but I don't know why it's not covered in Kafka. When a message comes in, and another message with the same key arrives, the first version should be deleted automatically. We want to keep only one instance of a message at any given time, the latest one. However, Kafka doesn't have this functionality built-in. It keeps all the data, and we have to manually delete the older versions. So, I would like to have only one instance of messages, based on the keys. If the key is the same, there should always be the latest message present instead of all versions of that message.
