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 ('0164e57c2a44ef2100f6d309afd90538', -1, 1768313889, 1768313889, 'd849d89c', 8, 0, 0)

Line : 187
File : sessions.php