Prefixes per VLAN no longer listed in VLANs list after upgrade to 2.9.2

[koratfood]

Environment

• Python version: 3.8.2
• NetBox version: 2.8.6 / 2.9.2

Steps to Reproduce

1. [Netbox 2.8.6] Create VLAN Group with name "test"
2. [Netbox 2.8.6] Create VLAN with ID 1, name "test", group "test"
3. [Netbox 2.8.6] Create Prefix 10.0.0.0/24 with VLAN group "test" and vlan "test (1)".
4. [Netbox 2.8.6] Go to IPAM -> VLAN Groups -> test
5. [Netbox 2.8.6] Observe and take note of the "Prefixes" column for VLAN "test".
6. Upgrade Netbox from 2.8.6 to 2.9.2
7. [Netbox 2.9.2] Go to IPAM -> VLAN Groups -> test
8. [Netbox 2.9.2] Again, observe and take note of the "Prefixes" column for VLAN "test".

Expected Behavior

Prefixes per VLAN are still listed in the "Prefixes" column after upgrade to Netbox 2.9.2.

Observed Behavior

Prefixes per VLAN are no longer listed in the "Prefixes" column after upgrade to Netbox 2.9.2.