Incompatible behaviour for insert ignore processing incorrect time value

[cfzjywxk]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

CREATE TABLE `tbl_0` (
  `col_0` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `col_1` bigint(20) unsigned NOT NULL,
  `col_2` char(231) CHARACTER SET utf8 NOT NULL DEFAULT 'DMj',
  `col_3` bit(1) NOT NULL,
  `col_4` bigint(20) unsigned NOT NULL,
  PRIMARY KEY (`col_1`,`col_0`,`col_4`,`col_2`,`col_3`),
  UNIQUE KEY `idx_1` (`col_3`,`col_4`),
  KEY `idx_2` (`col_1`,`col_0`)
)

insert  ignore into tbl_0 set col_1 = 107571123720455541 on duplicate key update col_3 = 0;

select * from tbl_0;

2. What did you expect to see? (Required)

select * from tbl_0;
+---------------------+--------------------+-------+--------------+-------+
| col_0               | col_1              | col_2 | col_3        | col_4 |
+---------------------+--------------------+-------+--------------+-------+
| 2021-04-25 18:11:38 | 107571123720455541 | DMj   | 0x00         |     0 |
+---------------------+--------------------+-------+--------------+-------+
1 row in set (0.00 sec)

The result of col_0 contains a correct time value.

3. What did you see instead (Required)

mysql> select * from tbl_0;
+---------------------+--------------------+-------+--------------+-------+
| col_0               | col_1              | col_2 | col_3        | col_4 |
+---------------------+--------------------+-------+--------------+-------+
| 0000-00-00 00:00:00 | 107571123720455541 | DMj   | 0x00         |     0 |
+---------------------+--------------------+-------+--------------+-------+

The result of col_0 contains a invalid time value.

4. What is your TiDB version? (Required)

master branch with 4ac76b4 commit hash

Seems the meaning of ON UPDATE CURRENT_TIMESTAMP is not compatible.