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 ('d2e75a704c65e7b6690fb3f47844f2bb', -1, 1766617829, 1766617829, 'd849d817', 6, 0, 0)

Line : 187
File : sessions.php