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 ('6418351d0df4a3d80e418d14e9f3e448', -1, 1414811482, 1414811482, '36a1caea', -1, 0, 0)

Line : 187
File : sessions.php