我有个主题 post_users_t 使用时 PRINT 我得到命令了

rowtime: 4/2/20 2:03:48 PM UTC, key: <null>, value: {"userid": 6, "id": 8, "title": "testest", "body": "Testingmoreand more"}
rowtime: 4/2/20 2:03:48 PM UTC, key: <null>, value: {"userid": 7, "id": 11, "title": "testest", "body": "Testingmoreand more"}

然后我用这个来创建一个流：

CREATE STREAM userstream (userid INT, id INT, title VARCHAR, body VARCHAR)
    WITH (KAFKA_TOPIC='post_users_t',
          VALUE_FORMAT='JSON');

但我不能从中选择任何东西 DESCRIBE EXTENDED 所有的消息都失败了。

consumer-messages-per-sec:      1.06 consumer-total-bytes:    116643 consumer-total-messages:      3417     last-message: 2020-04-02T14:08:08.546Z
consumer-failed-messages:      3417 consumer-failed-messages-per-sec:      1.06      last-failed: 2020-04-02T14:08:08.56Z

我做错什么了？
额外信息下！
从头打印主题：

ksql> print 'post_users_t' from beginning limit 2;
Key format: SESSION(AVRO) or HOPPING(AVRO) or TUMBLING(AVRO) or AVRO or SESSION(PROTOBUF) or HOPPING(PROTOBUF) or TUMBLING(PROTOBUF) or PROTOBUF or SESSION(JSON) or HOPPING(JSON) or TUMBLING(JSON) or JSON or SESSION(JSON_SR) or HOPPING(JSON_SR) or TUMBLING(JSON_SR) or JSON_SR or SESSION(KAFKA_INT) or HOPPING(KAFKA_INT) or TUMBLING(KAFKA_INT) or KAFKA_INT or SESSION(KAFKA_BIGINT) or HOPPING(KAFKA_BIGINT) or TUMBLING(KAFKA_BIGINT) or KAFKA_BIGINT or SESSION(KAFKA_DOUBLE) or HOPPING(KAFKA_DOUBLE) or TUMBLING(KAFKA_DOUBLE) or KAFKA_DOUBLE or SESSION(KAFKA_STRING) or HOPPING(KAFKA_STRING) or TUMBLING(KAFKA_STRING) or KAFKA_STRING
Value format: AVRO or KAFKA_STRING
rowtime: 4/2/20 1:04:08 PM UTC, key: <null>, value: {"userid": 1, "id": 1, "title": "loremit", "body": "loremit heiluu ja paukkuu"}
rowtime: 4/2/20 1:04:08 PM UTC, key: <null>, value: {"userid": 2, "id": 2, "title": "lorbe", "body": "larboloilllaaa"}