SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Host '1blu' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'
mysql error number: 1129
mysql version: unknown
php version: 5.3.29
Date: 18.01.2019 @ 09:02
Script: /misc.php?action=faq3&sid=fcf3455d3e3bce79b5fa6762cd7182e7
Referer: