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 ('120a161c35e0090c8811d80498e15c50', -1, 1758168178, 1758168178, 'd849d828', -4, 0, 0)

Line : 187
File : sessions.php