Assertion Key failed when loading data from file

Exact Error Message :
`(conn=549) assertion failed: key: 74800000000000006a5f728000000000000001, assertion: NotExist, start_ts: 434397622915301382,
existing start ts: 434397599636914178, existing commit ts: 434397599636914179`

Command used:
`LOAD DATA LOCAL INFILE '/home/abhinav/blitzz_work/replicant-core/data/default/tmp/test.a1.csv.part_0' REPLACE INTO TABLE `test`.`a1` FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' ESCAPED BY '\\' LINES TERMINATED BY '
' (`col1`, `col2`)`

Tidb: Playground
OS:
ubuntu 20.04

Dont know why it is happening.
If you need any more info, comment

Thank You :)