Fixes #4052: Fix error when bulk importing interfaces to virtual machines

docs/release-notes/version-2.7.md

@@ -4,6 +4,7 @@
 
 * [#4043](https://github.com/netbox-community/netbox/issues/4043) - Fix toggling of required fields in custom scripts
 * [#4049](https://github.com/netbox-community/netbox/issues/4049) - Restore missing `tags` field in IPAM service serializer
+* [#4052](https://github.com/netbox-community/netbox/issues/4052) - Fix error when bulk importing interfaces to virtual machines
 * [#4056](https://github.com/netbox-community/netbox/issues/4056) - Repair schema migration for Rack.outer_unit (from #3569)
 
 ---

netbox/dcim/forms.py

@@ -2726,7 +2726,7 @@ class InterfaceCSVForm(forms.ModelForm):
         super().__init__(*args, **kwargs)
 
         # Limit LAG choices to interfaces belonging to this device (or VC master)
-        if self.is_bound:
+        if self.is_bound and 'device' in self.data:
             try:
                 device = self.fields['device'].to_python(self.data['device'])
             except forms.ValidationError: