Setup ObjectChangeFilterForm __init__ to add query_param to filter_id

netbox/core/forms/filtersets.py

@@ -128,6 +128,16 @@ class JobFilterForm(SavedFiltersMixin, FilterForm):
 
 
 class ObjectChangeFilterForm(SavedFiltersMixin, FilterForm):
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        # Limit saved filters to those applicable to the form's model
+        object_type = ObjectType.objects.get_for_model(self.model)
+        self.fields['filter_id'].widget.add_query_params({
+            'object_type_id': object_type.pk,
+        })
+
     model = ObjectChange
     fieldsets = (
         FieldSet('q', 'filter_id'),