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 ('6e2c082f1ebd5a5fc86b826e2463743b', -1, 1748183044, 1748183044, '12d8d3ad', -2, 0, 0)

Line : 189
File : sessions.php