phpBB : Kritischer Fehler

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO phpbb_deu_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('5854257623906cbb09cd1165d9c9f3cc', -1, 1429327087, 1429327087, '369e98d4', 1, 0, 0)

Line : 187
File : sessions.php