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 ('100c1451d5a05c1d70bedb241e813d15', -1, 1441278261, 1441278261, '36dd12cc', 26, 0, 0)

Line : 187
File : sessions.php