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 ('621d53c5ac1573df77ed63afb5f7b17a', -1, 1532069888, 1532069888, '36a27b4a', 4, 0, 0)

Line : 187
File : sessions.php