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 ('3484131217b7cbd05bb8eb9625d8a3fa', -1, 1767740630, 1767740630, 'd849d82b', 7, 0, 0)

Line : 187
File : sessions.php