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 ('76571d3deb8ad9f4e7d68c78f0aa8876', -1, 1769769108, 1769769108, 'd849d83b', -4, 0, 0)

Line : 187
File : sessions.php