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 ('8a3046ad01f931d8f701dd42a9f83e9c', -1, 1623708621, 1623708621, '03d74f74', -4, 0, 0)

Line : 187
File : sessions.php