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 ('ca8af9af29e03a10ce946370bed75c1c', -1, 1730415910, 1730415910, '03114b1b', 9, 0, 0)

Line : 195
File : sessions.php