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 ('0ef941fe7e4587a59d1905c55063a95b', -1, 1711711711, 1711711711, '03ede8c4', -4, 0, 0)

Line : 187
File : sessions.php