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`='ae040dcacc076448a327f9158b6ad8eb',`time`='1711691519',`ip`='54.225.21.228',`location`='/showthread.php?tid=9&pid=26',`useragent`='claudebot',`location1`='3',`location2`='9',`nopermission`='0'