Steps to reproduce:

1. Define a new action is auto registration for prod linux hosts
2. Define conditions as "Host metadata not like WIN" and "_Host metadata like _PROD"
3. Define operations as "Send message to user groups: ZabbixSuperAdmins via all media" and "Add to host groups: IBM_UNIX PROD, Linux servers, Production (PRI)" and "Link to templates: PRI, Template_IBM_Linux, Template_UNIX_TopMemoryProcs"

Result:
A new agent got auto-registered for every minute

Expected:
A new agent got auto-registered only once.