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 ('804367c746c67cd91893e23ed6c9f0be', -1, 1757900958, 1757900958, 'd849d8bc', 1, 0, 0)

Line : 187
File : sessions.php