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 ('ac1a8cfeac50b62259545e08702bc8b9', -1, 1411503641, 1411503641, '365cf19d', 0, 0)

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