21 What's new in Zabbix 4.0.16

Import option to remove existing template linkage

During host or template import it is now possible to update template linkage using the Delete missing option. If using this option any template linkage that does not also exist in the import file will be deleted from the existing host/template along with all entities inherited from these unlinked templates (items, triggers, etc).

By default this option is unchecked and before it is possible to mark this checkbox a warning message is displayed that all inherited entities may be lost as a result.