We test in Zabbix 4.4.5 Version

1.Create a new template " Template - 20200406 test" , only have 1 item, and didn't link to another template

2.Create a new host "test123", and the only link new template is " Template - 20200406 test"

3.When click add, showing below error

Cannot add host

• Template cannot be linked to another template more than once even through other templates.