Fixes #6759: Fix assignment of parent interfaces for bulk import

docs/release-notes/version-2.11.md

@@ -5,6 +5,7 @@
 ### Bug Fixes
 
 * [#5442](https://github.com/netbox-community/netbox/issues/5442) - Fix assignment of permissions based on LDAP groups
+* [#6759](https://github.com/netbox-community/netbox/issues/6759) - Fix assignment of parent interfaces for bulk import
 * [#6773](https://github.com/netbox-community/netbox/issues/6773) - Add missing `display` field to rack unit serializer
 * [#6774](https://github.com/netbox-community/netbox/issues/6774) - Fix A/Z assignment when swapping circuit terminations
 * [#6777](https://github.com/netbox-community/netbox/issues/6777) - Fix default value validation for custom text fields

netbox/dcim/forms.py

@@ -3378,13 +3378,18 @@ class InterfaceCSVForm(CustomFieldModelCSVForm):
                 Q(device=device) | Q(device__virtual_chassis=device.virtual_chassis),
                 type=InterfaceTypeChoices.TYPE_LAG
             )
+            self.fields['parent'].queryset = Interface.objects.filter(
+                Q(device=device) | Q(device__virtual_chassis=device.virtual_chassis)
+            )
         elif device:
             self.fields['lag'].queryset = Interface.objects.filter(
                 device=device,
                 type=InterfaceTypeChoices.TYPE_LAG
             )
+            self.fields['parent'].queryset = Interface.objects.filter(device=device)
         else:
             self.fields['lag'].queryset = Interface.objects.none()
+            self.fields['parent'].queryset = Interface.objects.none()
 
     def clean_enabled(self):
         # Make sure enabled is True when it's not included in the uploaded data