Unexpected HA_ERR_TABLE_DEF_CHANGED upon CREATE..SELECT with SERIALIZABLE and unique blob

--source include/have_innodb.inc

CREATE TABLE t (a INT PRIMARY KEY) ENGINE=InnoDB;

INSERT INTO t VALUES (1),(2);

SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;

SET innodb_snapshot_isolation = ON;

CREATE TABLE t2 (b BLOB, UNIQUE(b)) ENGINE=InnoDB AS SELECT a AS b FROM t;

DROP TABLE t, t2;

mysqltest: At line 8: query 'CREATE TABLE t2 (b BLOB, UNIQUE(b)) ENGINE=InnoDB AS SELECT a AS b FROM t' failed: HA_ERR_TABLE_DEF_CHANGED (159): InnoDB: insufficient history for index 0

2026-02-23 22:48:32 4 [ERROR] InnoDB: DROP TABLE `test`.`t2`: Record changed

commit 7fbbbc983f054a9c9c7f36ea8a9778ff3793a151

Author: Marko Mäkelä

Date:   Fri Jul 11 16:07:08 2025 +0300

    MDEV-36330: SERIALIZABLE read inconsistency

    At TRANSACTION ISOLATION LEVEL SERIALIZABLE, InnoDB would fail to flag