MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
1062 - Duplicate entry '0' for key 'uid'
Query:
REPLACE INTO mybb_sessions SET `uid`='0',`sid`='4a3b9343095e98ca7c4c1dfd5342f4ee',`time`='1711647670',`ip`='54.198.37.250',`location`='/showthread.php?mode=linear&tid=4&pid=71',`useragent`='claudebot',`location1`='3',`location2`='4',`nopermission`='0'