phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9afc5d9688bd64c2d1473145bee8204b', -1, 1729691431, 1729691431, '03150ce5', 0, 0, 0)

Line : 172
File : sessions.php