Import contact csv file failed

Your software
My Mautic version is: 5.2.1
My PHP version is: 8
My Database type and version is:

Your problem
My problem is: Import contact csv file failed

These errors are showing in the log:
Import 617 with 3078 rows is starting.
1167/3078 [==========>-----------------] 37%Import failed. Reason: There was a database error: An exception occurred while executing a query: SQLSTATE[22001]: String data, right truncated: 1406 Data too long for column ‘firstname’ at row 1. The import was set to delayed state and will be imported later.
Steps I have tried to fix the problem: