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 ('2b431f34db10ab55c5f0b6d3081e7f01', -1, 1766082353, 1766082353, 'd849d817', 5, 0, 0)

Line : 187
File : sessions.php