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 ('e9d2227909bb6d9ab0d36ebf9f791b37', -1, 1762509807, 1762509807, 'd849d81c', -4, 0, 0)

Line : 187
File : sessions.php