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 ('8b2457a718926d22a184d445073782f9', -1, 1762147456, 1762147456, 'd849d8dd', 9, 0, 0)

Line : 187
File : sessions.php