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) VALUES ('2b84e5fd62bce0c2eee9b096305b12e5', -1, 1714410464, 1714410464, '12d9d048', 18, 0)

Line : 158
File : sessions.php