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) VALUES ('b6740352b9e1620e05ba5cdd7a0b080d', -1, 1714282016, 1714282016, '12d9e423', 20, 0)

Line : 158
File : sessions.php