(copy of subissue (4) from ZBXNEXT-6802)

Steps to reproduce:
1) Create tempalte with hostprototype. 
2) Add 2 SNMP interfaces to hostprototype:
First 
      SNMP version: SNMPv2
      SNMP community: 2_snmp_2
Second
      SNMP version: SNMPv1
      SNMP community: 1_snmp_1
3) Create Autoregistratino Action with operation - link template. 
4) Turn on server and agent. Wait till host with linked tempalte is created.
5) Unlink template. 
6) In templates hostprototype add DNS name to SNMPv1 - 1_add_dns_for_SNMP_1

7) Change Hostmetadata, turn on server and agent.
8) Check audit after template is linked. 
Result:

I have no idea why he shows changes for both interfaces. 
Expected:
Only changes for one SNMP interface.

Server logs:

 344970:20210813:171417.549 query [txnlev:1] [update hosts set templateid=10423 where hostid=10427;
update group_prototype set templateid=56 where group_prototypeid=60;
update group_prototype set templateid=57 where group_prototypeid=61;
update interface set main=0 where interfaceid=16;
update interface_snmp set version=2,community='2_snmp_2' where interfaceid=16;
update interface set main=1,dns='1_add_dns_for_SNMP_1' where interfaceid=17;
update interface_snmp set version=1,community='1_snmp_1' where interfaceid=17;
update host_tag set tag='tag_name_1',value='tag_value_1' where hosttagid=6;
]