VLAN's linked to respective Subnets

Originally from ticket #1513.

We have an interface Vlan84 which has an IP address 10.65.84.2. This IP belongs to the subnet 10.65.84.0/24. You can see in the below screen shot the IP address belongs to Vlan84 and subnet 10.65.84.0/24.

But when I go to the subnet page, the Parent VLAN is empty, please see the below snap shot:

Is it possible to relate both automatically. Please let me know if you need some more clarification.