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 ('2a3a46c0adf6a2a5f18f8f5b7abc3fe1', -1, 1766592923, 1766592923, 'd849d817', 6, 0, 0)

Line : 187
File : sessions.php