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 ('905c2adc932fece8aa3ee74cc40337fb', -1, 1730419144, 1730419144, '03951736', -1280, 0, 0)

Line : 195
File : sessions.php