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`='c812165b4f5bd91ba0b0cb910fbc13de',`time`='1711648915',`ip`='44.221.43.88',`location`='/showthread.php?mode=threaded&tid=4&pid=70',`useragent`='claudebot',`location1`='3',`location2`='4',`nopermission`='0'