Upgrading our pega version from 7.3 to 8.3 in our company. In this comprehensive regression test, we noticed something difference. In the old version (pega 7.3) we could select our data set as stream. However, in the 8.3 version, we cannot select a Stream. Instead, we choose to be Kafka and Kinesis. Frankly, we don't know anything about Kinesis. What can we do to get the flow as before and can you learn about Kinesis?