phpBB : Kritischer Fehler

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('1421a4ebf7982dda15edb83d21d70f37', -1, 1623702244, 1623702244, '03d74f74', 6, 0, 0)

Line : 187
File : sessions.php