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 ('589fceed93d06c4382b2bb2d88a19c9d', -1, 1780747035, 1780747035, 'd849d9a5', 1, 0, 0)

Line : 189
File : sessions.php