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 ('4a5cd4e3ad8d7b65f34e19cd4772523c', -1, 1768556549, 1768556549, 'd849d854', 1, 0, 0)

Line : 187
File : sessions.php