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`='fd09e521287bb4aad1948e0d39ba694a',`time`='1711677908',`ip`='54.221.43.155',`location`='/showthread.php?tid=2&pid=9&mode=threaded',`useragent`='claudebot',`location1`='3',`location2`='2',`nopermission`='0'