phpBB : Erro Crítico

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO f_activesessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('6816408529837086b89a9160304d666b', -1, 1756631946, 1756631946, 'd849d803', 5, 0, 0)

Line : 187
File : sessions.php