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 ('7dfd2d009a7b52b4c1cc0f5769d5bb49', -1, 1714239474, 1714239474, '0391978d', -4, 0)

Line : 158
File : sessions.php