insert.. select * from (subselect) throw "is not in GROUP BY clause" , even if it is part of group by clause

drop table if exists `I1`;

drop table if exists `C2`;

 CREATE TABLE `I1` (

  `id` int(11) DEFAULT NULL,

  `intc` int(11) DEFAULT NULL

) ENGINE=Columnstore DEFAULT CHARSET=utf8;

CREATE TABLE `C2` (

  `intc` int(6) DEFAULT NULL,

`id` int(11) NOT NULL,

 `mm_prezzo` decimal(12,0) DEFAULT NULL

) ENGINE=Columnstore DEFAULT CHARSET=utf8;

INSERT INTO I1

select * from (SELECT id,intc

FROM C2

WHERE  intc IN (201909)

GROUP BY id,intc) as sel1;

ERROR 1815 (HY000): Internal error: IDB-2021: 'intc' is not in GROUP BY clause. All non-aggregate columns in the SELECT and ORDER BY clause must be included in the GROUP BY clause.