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 ('38e48540ef0af28bd5b0b64c2733776a', -1, 1769859608, 1769859608, 'd849d83b', 3, 0, 0)

Line : 187
File : sessions.php