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 ('a43053825bce5c38dbb2a9376a48690c', -1, 1713508473, 1713508473, '0391a607', 2, 0, 0)

Line : 187
File : sessions.php