Procedure

1) Create template.

2) Link the following template.

• Template App Zabbix Server
• Template OS Linux

3) Save template.
The number of items at this point is 63.

4)Open the saved template and "Unlink and clear" the following template.

• Template App Zabbix Server
• Template OS Linux

5) Save template.
The number of items at this point is 31.
Items of "Template App Zabbix Server" are left.