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 @ 11:26
Script: /thread.php?postid=2100498&sid=629bc70d6ffc5959ec064808523f0575
Referer: