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 ('d3922ae2e702c33c6dbf3d0095002e42', -1, 1513478829, 1513478829, '36dd4c44', -2, 0, 0)

Line : 187
File : sessions.php