In start I am new to Linux/Zabbix so sorry if i don't get you at first
I upgraded server from 2.2 to 3.2 everything went good, copied all config files then there was a problem with upgrading database. Solved that with adding index in history_text.
Data base upgraded but now i get error: added in attachment. From my point of view database have upgraded to new one but Front end is sitting in old version(I can be wrong). Wanted to ask what can be done?
The interesting part is that i receive zabbix messages to my email.

What log do you need to see what is the problem. Zabbix server os installed on RHEL 6.6.