title: Zabbix upgrade from 4.0.21 to 5.2 mysqlversion error
body: <p>Good morning Dear.</p>
  <p>I am having a problem updating my Zabbix server. Currently I have running the zabbix server version &quot;zabbix_server (Zabbix) 4.0.21&quot; with Ubuntu 16.04 xenial.</p>
  <p>I want to update it to zabbix server 5.2 with Ubuntu 20.04 focal.</p>
  <p>I installed in a new virtual server with Ubuntu 20.04 focla and I had no problems except for the version of the zabbix database, it has the following version:</p>
  <p>mysql&gt; select * from dbversion;</p>
  <ul>
  <li>----------- + ---------- +
  | mandatory | optional |</li>
  <li>----------- + ---------- +
  | 4010004 | 4010004 |</li>
  <li>----------- + ---------- +
  1 row in set (0.00 sec)</li>
  </ul>
  <p>I would need to update at least to version 5020000, does anyone know how I can make this update?</p>
  <p>From already thank you very much.</p>
  <p>Greetings.</p>