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 ('36c8e7829ec39f8317d95ead34349c5e', -1, 1397826384, 1397826384, '36ead9f7', -1, 0, 0)

Line : 187
File : sessions.php