MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
1062 - Duplicate entry '1524594205-54.80.103.120-0' for key 'datetime'
Query:
UPDATE mybb_lastvisitors SET `ip`='54.80.103.120', `uid`='0', `username`='', `datetime`='1524594205', `referrer`='', `url`='/showthread.php?tid=83040&pid=146044', `info`='CCBot/2.0 (http://commoncrawl.org/faq/)' WHERE ip='14.177.236.167' AND datetime='1524593180'