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 ('f7ff36dfda8e0aaf58b7fd42e72208d7', -1, 1752713769, 1752713769, 'd849d8af', -8, 0, 0)

Line : 187
File : sessions.php