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 ('726a6d8f742f594c8e6bd190d173b71a', -1, 1513630552, 1513630552, '36eaf776', 8, 0, 0)

Line : 187
File : sessions.php