phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './twisty_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 ('4a4bbc356a2ccf2517961b093e423dc0', -1, 1513603258, 1513603258, '36f2cd21', 4, 0, 0)

Line : 187
File : sessions.php