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 ('8d7def08b42064c8f364c1ca432d8d47', -1, 1764051865, 1764051865, 'd849d8b5', -4, 0, 0)

Line : 187
File : sessions.php