加列errCode = 2, detailMessage = schema change tasks failed on same tablet reach threshold [[ALTER]

Version : doris-2.0.3-rc06

BuildInfo : VM-16-12-centos

执行alter add column 《ALTER TABLE mytableName ADD column F varchar(100) NULL COMMENT 'F' after REQ_TYPE;》， 显示执行成功，但表结构未更改

执行SHOW ALTER TABLE COLUMN： 查看log: errCode = 2, detailMessage = schema change tasks failed on same tablet reach threshold [[ALTER]

表属性：
PROPERTIES (
"replication_allocation" = "tag.location.default: 3",
"is_being_synced" = "false",
"storage_format" = "V2",
"light_schema_change" = "true",
"disable_auto_compaction" = "false",
"enable_single_replica_compaction" = "false"
);