Assertion Key failed when loading data from file with replace

## Bug Report

Please answer these questions before submitting your issue. Thanks!

`load replace grammar` can not take the right action.
MySQL actions are below:

### 1. Minimal reproduce step (Required)
```
CREATE TABLE `account` (
`id` int(11) NOT NULL,
`name` varchar(20) DEFAULT NULL,
PRIMARY KEY (`id`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;

insert into account values (123456789,'aaa');
insert into account values (12345678,'bbb');
insert into account values (1234567,'ccc');
insert into account values (123456,'ddd');
insert into account values (12345,'eee');

SELECT * FROM account INTO OUTFILE '/home/tidb/mysql57/runoob3.txt'
FIELDS TERMINATED BY ',' ENCLOSED BY '"'
LINES TERMINATED BY '\n';
mysql> truncate table test.account ;
Query OK, 0 rows affected (0.09 sec)

mysql> LOAD DATA local INFILE '/home/tidb/mysql57/runoob3.txt' replace INTO TABLE test.account FIELDS TERMINATED BY ',' ENCLOSED BY '"' ;
Query OK, 5 rows affected (0.00 sec)
Records: 5 Deleted: 0 Skipped: 0 Warnings: 0

mysql> LOAD DATA local INFILE '/home/tidb/mysql57/runoob3.txt' replace INTO TABLE test.account FIELDS TERMINATED BY ',' ENCLOSED BY '"' ;
ERROR 8141 (HY000): assertion failed: key: 74800000000000007b5f728000000000003039, assertion: NotExist, start_ts: 435485041765122052, existing start ts: 435485040415080450, existing commit ts: 435485040415080451
```

### 2. What did you expect to see? (Required)
```
mysql> LOAD DATA local INFILE '/home/tidb/mysql57/runoob3.txt' replace INTO TABLE test.account FIELDS TERMINATED BY ',' ENCLOSED BY '"' ;
Query OK, 5 rows affected (0.00 sec)
Records: 5 Deleted: 0 Skipped: 0 Warnings: 0
```

### 3. What did you see instead (Required)
```
mysql> LOAD DATA local INFILE '/tmp/runoob3.txt' replace INTO TABLE test.account FIELDS TERMINATED BY ',' ENCLOSED BY '"' ;
ERROR 8141 (HY000): assertion failed: key: 7480000000000000795f728000000000003039, assertion: NotExist, start_ts: 435484900482613250, existing start ts: 435484893837524993, existing commit ts: 435484893837524994
```
### 4. What is your TiDB version? (Required)

tidb version == v6.1.0
anyway mysql client (v5.7 or v8)

Start by reproducing the reported sequence on TiDB v6.1.0: create the account table, export its rows, truncate it, then run the LOAD DATA LOCAL INFILE ... REPLACE command twice. Trace the LOAD DATA REPLACE path when the second load raises assertion 8141. Done means the repeated load succeeds with five affected rows and no assertion failure.

Written by the indexing model from the issue text.