Steps to reproduce:

1. Discover a host using a Discovery Rule
   1. Discovery rule checks for IP range and Discovery Status = Up
2. Add the host using a Discovery Action
   1. If <Discovery Rule>, Add Host, Add to Group
3. Change the IP address of the host in your environment
4. Delete the host from Zabbix

Result:

1. Zabbix re-adds the host using the old IP address

Expected:

1. Zabbix does not re-add hosts that are not discovered or contactable.

Screenshots

1) Device not discovered for over 8 days

2) Device having to be disabled by Administrators because of erroneous rediscovery.