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 ('ae7c4619a3595a36fd8d1b6f7abbb707', -1, 1714619921, 1714619921, '03910f01', 6, 0)

Line : 158
File : sessions.php