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 ('09c098c651cf71430dc8f9796a3fe019', -1, 1713535459, 1713535459, '12df7ddb', -4, 0, 0)

Line : 187
File : sessions.php