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 ('4c8b55f4e89f72ddd4875fa6e5b95d67', -1, 1767789892, 1767789892, 'd849d82b', 6, 0, 0)

Line : 187
File : sessions.php