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 ('084f80527905d4cd838d21c3cbd2e8a9', -1, 1713977828, 1713977828, '0390bdb1', -9, 0, 0)

Line : 187
File : sessions.php