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 ('7a91d5172ce7caaa49beb7669589e7ea', -1, 1730419877, 1730419877, '0387c0b9', 6, 0, 0)

Line : 195
File : sessions.php