Add distinct() to filtering VLANs by assigned interface

netbox/ipam/filtersets.py

@@ -1078,15 +1078,15 @@ def filter_interface_id(self, queryset, name, value):
         return queryset.filter(
             Q(interfaces_as_tagged=value) |
             Q(interfaces_as_untagged=value)
-        )
+        ).distinct()
 
     def filter_vminterface_id(self, queryset, name, value):
         if value is None:
             return queryset.none()
         return queryset.filter(
             Q(vminterfaces_as_tagged=value) |
             Q(vminterfaces_as_untagged=value)
-        )
+        ).distinct()
 
 
 class ServiceTemplateFilterSet(NetBoxModelFilterSet):