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: 23.08.2019 @ 09:43
Script: /thread.php?threadid=1154&threadview=0&hilight=&hilightuser=0&amp
Referer: