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 ('00d779bc21b990218263c44e73d3d9c4', -1, 1764876958, 1764876958, 'd849d8a7', -4, 0, 0)

Line : 187
File : sessions.php