diff --git a/interactive_engine/compiler/src/main/java/com/alibaba/graphscope/common/result/Utils.java b/interactive_engine/compiler/src/main/java/com/alibaba/graphscope/common/result/Utils.java
index 9efa9876747b..6b306701bf0e 100644
--- a/interactive_engine/compiler/src/main/java/com/alibaba/graphscope/common/result/Utils.java
+++ b/interactive_engine/compiler/src/main/java/com/alibaba/graphscope/common/result/Utils.java
@@ -140,6 +140,8 @@ public static String parseLabelValue(Common.Value value, GraphLabelType type) {
                 return parseLabelValue(value.getI32(), type);
             case I64:
                 return parseLabelValue(value.getI64(), type);
+            case NONE:
+                return null;
             default:
                 throw new IllegalArgumentException(
                         "cannot parse label value with type=" + value.getItemCase().name());