phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ac98d8daff2c2c5067b49cf8b2696770' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('ac98d8daff2c2c5067b49cf8b2696770', -1, 1766348655, 1766348655, 'd849d893', -9, 0)

Line : 180
File : /www/includes/sessions.php