The "_id" attribute should be added only for VMDB objects.

The "_id" attribute is not meant for fields like password::dialog_password_field.

https://bugzilla.redhat.com/show_bug.cgi?id=1619385

lib/miq_automation_engine/engine/miq_ae_engine/miq_ae_object.rb

@@ -271,7 +271,7 @@ def process_args_attribute(args, args_key)
       if args_key.include?(CLASS_SEPARATOR)
         key, klass = get_key_name_and_klass_from_key(args_key)
         value = args.delete(args_key)
-        args["#{key}_id"] = value unless @attributes.key?(key)
+        args["#{key}_id"] = value if attribute_for_vmdb_object?(klass, value) && !@attributes.key?(key)
         args[key] = MiqAeObject.convert_value_based_on_datatype(value, klass)
       else
         args[args_key.downcase] = args.delete(args_key) if args_key != args_key.downcase
@@ -854,5 +854,9 @@ def classify_value(value)
         return self[value]
       end
     end
+
+    def attribute_for_vmdb_object?(klass, value)
+      klass.safe_constantize && value.to_i.nonzero?
+    end
   end
 end