phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './private_phpb1/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 ('5bed9fbdbb13a2f9ed7c80f7a11c95a8', -1, 1397826421, 1397826421, '32134a43', 12, 0, 0)

Line : 187
File : sessions.php