diff --git a/iotdb-api/pipe-api/src/main/java/org/apache/iotdb/pipe/api/customizer/parameter/PipeParameterValidator.java b/iotdb-api/pipe-api/src/main/java/org/apache/iotdb/pipe/api/customizer/parameter/PipeParameterValidator.java
index 7d55b44f37a76..9ea9fb64d9bba 100644
--- a/iotdb-api/pipe-api/src/main/java/org/apache/iotdb/pipe/api/customizer/parameter/PipeParameterValidator.java
+++ b/iotdb-api/pipe-api/src/main/java/org/apache/iotdb/pipe/api/customizer/parameter/PipeParameterValidator.java
@@ -68,10 +68,6 @@ public PipeParameterValidator validateAttributeValueRange(
       }
     }
 
-    if (canBeOptional) {
-      return this;
-    }
-
     throw new PipeAttributeNotProvidedException(
         String.format("%s should be one of %s", key, Arrays.toString(optionalValues)));
   }