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: 23.01.2019 @ 06:23
Script: /profile.php?userid=46&sid=3255c0e54ab4d0ab1829520abb5bb832
Referer: