MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
1062 - Duplicate entry '0' for key 'location1'
Query:
REPLACE INTO mybb_sessions SET `uid`='0',`sid`='4b9c624b15768f4949c5e4a344a381b6',`time`='1711678076',`ip`='54.227.104.229',`location`='/calendar.php?calendar=1&year=2016&month=12',`useragent`='claudebot',`location1`='0',`location2`='0',`nopermission`='0'