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 ('4dd3ee3746199dd8a1ab26e053c01abb', -1, 1764672205, 1764672205, 'd849d88b', 8, 0, 0)

Line : 187
File : sessions.php