Steps to reproduce:

1. I created a Linux and configured "systemlinux" metadata value in zabbix_agent.conf
2. I created an action with condition - Host metadata like systemlinux and two operations:Add to host groups: SystemTestLinux and Link to templates: Linux system test template

Result:

The host is not being added to the template. Looking at zabbix_server.log I see the following error: "cannot link template(s) "Linux system test" to host "xxxxx": conflicting item key "net.if.discovery" found" 

• Its important to note that I have other actions that link to other temaples using metadata that are working fine. 
  Expected:
  The host should be added to Linux system test template