doris3.0.7 ARRAY<VARCHAR(100)> to target type=VARCHAR(65533)

[HWTsang]

CREATE TABLE `ad_materials` (
  `ad_name` varchar(100) NOT NULL COMMENT "广告名称",
  `tags` array<varchar(100)> NULL COMMENT "标签数组",
  `amount_spent` double NULL COMMENT "花费金额汇总",
) ENGINE=OLAP
UNIQUE KEY(`ad_name`)
DISTRIBUTED BY HASH(`ad_name`) BUCKETS AUTO

UPDATE ad_materials
        SET tags = array_union(ifnull(tags, []), ['21','21-1','21-1-2','21-1-1'])
        WHERE ad_name IN ('Pe1041d61');

1105 - errCode = 2, detailMessage = can not cast from origin type ARRAY<VARCHAR(100)> to target type=VARCHAR(65533)

how to fix this