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 ('1c8b9bbcc188320a853b002c398d01bb', -1, 1752528768, 1752528768, 'd849d840', -8, 0, 0)

Line : 187
File : sessions.php