Currently due to the limit of 29999 dependent items it is quite easy to lose ability to monitor VMware SD-WAN VeloCloud because of the dependent item limit.

With issues like https://support.zabbix.com/browse/ZBXNEXT-9233 being scheduled for 7.2, it will take some time before it is released, and dependent item limit is increased.

In the meantime, it could be possible to re-work the template to be something similar like the "Cisco Meraki Dashboard by HTTP" template, where host prototypes are used to create hosts inside of Zabbix based on the discovered devices, and a template is attached to them to actually perform the monitoring.

The "WMware SD-WAN VeloCloud by HTTP" is similar in the way that it also discovers devices - Edge routers and Gateways, so creating hosts from host prototypes for these discovered devices makes sense, and also will help with hitting the dependent item limit.