phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './phpBB/phpbb_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('96b569280fa6d79a9b12a4c1278ad6ba', -1, 1484658311, 1484658311, '36cd0992', -6, 0, 0)

Line : 187
File : sessions.php