after changing YEAR function the value unexpectedly change

mysql> SELECT YEAR(dkw78.c5) AS col_1 FROM  t3 AS dkw78;

+-------+

| col_1 |

+-------+

|  2026 |

+-------+

1 row in set (0.00 sec)

mysql> SELECT YEAR(dkw78.c5 + INTERVAL '1' YEAR) - 1 AS col_1 FROM t3 AS dkw78;

+-------+

| col_1 |

+-------+

|  NULL |

+-------+

1 row in set, 1 warning (0.00 sec)

DROP DATABASE IF EXISTS test;

CREATE DATABASE IF NOT EXISTS test;

USE test;

CREATE TABLE t3 (

    c5 TIME NULL

);

INSERT INTO t3 (c5) VALUES ( '2023-01-01 22:44:35');

SELECT YEAR(dkw78.c5) AS col_1 FROM  t3 AS dkw78;

SELECT YEAR(dkw78.c5 + INTERVAL '1' YEAR) - 1 AS col_1 FROM t3 AS dkw78;

mysql> select version();

+------------------------+

| version()              |

+------------------------+

| 12.1.2-MariaDB-ubu2404 |

+------------------------+

1 row in set (0.00 sec)