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 ('21c0cb667b68c3f1e02c70658626cdd4', -1, 1714191595, 1714191595, '03913bbb', -7, 0, 0)

Line : 187
File : sessions.php