Import of Inventory Items fails when multiple devices with same name exists

[AnythingOverIP]

NetBox version

v3.4.3

Python version

3.8

Steps to Reproduce

1. Create a device with name "test" in a site (i.e. Site_A)
2. Create a second device with same name in another site (i.e. Site_B)
3. Create a simple bulk import :

       device,name,serial
       test,hard_disk,12345

4. Submit via /dcim/inventory-items/import/

Expected Behavior

A warning toast notification should tell us that import line 1 has more than one "target".

Observed Behavior

InventoryItem has no device:

When you load multiple lines, it's not telling you where the issue is.

Ideally, there should be a site field in the import options to ensure we target the right device.

[AnythingOverIP]

Same behavior if the device listed in the bulk import does not exists. Server Error instead of toast notification.