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`='b621a4df8312fd37c6b49bcf23e2f1b2',`time`='1711654241',`ip`='18.206.12.31',`location`='/showthread.php?tid=9&pid=48&mode=threaded',`useragent`='claudebot',`location1`='3',`location2`='9',`nopermission`='0'