CQ can be created successfully but failed to execute

Use the following sql, I can successfully create CQ, but this CQ actually cannot pass the semantic check.  While it's executed, it will throw exception.

CREATE CONTINUOUS QUERY cq1
BEGIN
  SELECT count(s1)
  INTO root.cq.d1_d2(count_s1)
  FROM root.db.d1, root.db.d2
  GROUP BY(10s), LEVEL=1
END