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 ('3bceb1f68fe71cfc44b7b0f76d3d6a9c', -1, 1768829112, 1768829112, 'd849d854', 6, 0, 0)

Line : 187
File : sessions.php