Steps to reproduce:
1) Create 3 hosts - H1, H2, H3.
2) Add different versions of SNMP interfaces.
H1 - SNMPv1
H2 - SNMPv2
H3 - SNMPv3
3) To be sure, add template to hosts - Template App Squid SNMP
4) Turn on server and agent, wait till SNMP in the availability column becomes red.
5) Click on it and check error messages.

Result:
Error messages.
SNMPv1 - Timeout while connecting to "127.0.0.1:161".
SNMPv2 - Timeout while connecting to "127.0.0.1:161".
SNMPv3 - Cannot connect to "127.0.0.1:161": Timeout.

Expected:
Errors should be consistent.