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 ('d2bf92d26a9875ef6a769a45dc0cbd17', -1, 1767023300, 1767023300, 'd849d817', 6, 0, 0)

Line : 187
File : sessions.php