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 ('6f1093e76851d21b0b1a3c1d1e89e32a', -1, 1714000189, 1714000189, '12e3727d', -11, 0, 0)

Line : 187
File : sessions.php