Creating interface with duplicate name does not return error

[koratfood]

NetBox version

v3.4.3

Python version

3.10

Steps to Reproduce

1. Create a device called "Device1"
2. Create an interface on the device called "Ethernet1"
3. Try to create another interface on the device called "Ethernet1"

Expected Behavior

Netbox throws an error saying names cannot be duplicated.

Observed Behavior

"Add a new interface" page reloads, no error is thrown/shown.

[jeremystretch]

Looks like the error message is getting attached to the individual model form and not replicated to the "parent" form that enables multi-component creation.