phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './phpbb_1/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) VALUES ('5f4ebbbc3d5b9367b08a2fd8636d3f9e', -1, 1413880913, 1413880913, '36edc5a0', 5, 0)

Line : 158
File : /forum/includes/sessions.php