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`='68e020ac71142a7f2b13b7d42bcee3d5',`time`='1493137159',`ip`='23.20.219.0',`location`='/forum/showthread.php?tid=15836',`useragent`='CCBot/2.0 (http://commoncrawl.org/faq/)',`location1`='0',`location2`='15836',`nopermission`='0'