MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
1142 - INSERT command denied to user 'fairplaycup'@'localhost' for table 'mybb_sessions'
Query:
REPLACE INTO mybb_sessions SET `uid`='0',`sid`='5c4ce39f24d949d7d733d20b4bcfc194',`time`='1475149658',`ip`='107.21.149.142',`location`='/index.php?',`useragent`='CCBot/2.0 (http://commoncrawl.org/faq/)',`location1`='0',`location2`='0',`nopermission`='0'