我试图用CREATE INDEX ON chat.user_conversation (keys(conversations))在“会话”键上创建索引,但我面临的是ServerError: java.lang.RuntimeException: java.util.concurrent.ExecutionException: org.apache.cassandra.exceptions.ConfigurationException: Column family ID mismatch (found 6de73fd0-c3ec-11e8-b098-f58bd8d3766a; expected