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 ('0667979451d27e2525c68652c478a6a6', -1, 1757928959, 1757928959, 'd849d828', 4, 0, 0)

Line : 187
File : sessions.php