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 ('8c2e23fe3de31b750e14d4c2a7e7b47d', -1, 1397945178, 1397945178, '36d39968', -1, 0, 0)

Line : 187
File : sessions.php