diff --git a/src/main/java/com/ai/da/service/impl/GenerateServiceImpl.java b/src/main/java/com/ai/da/service/impl/GenerateServiceImpl.java
index 87bc3a48..3d443151 100644
--- a/src/main/java/com/ai/da/service/impl/GenerateServiceImpl.java
+++ b/src/main/java/com/ai/da/service/impl/GenerateServiceImpl.java
@@ -248,7 +248,7 @@ public class GenerateServiceImpl extends ServiceImpl<GenerateMapper, Generate> i
                             .object_name(objectName)
                             .bucket_name(userBucket)
                             .prompt(text).build();
-                    jsonString = JSON.toJSONString(imageProcessRequest, SerializerFeature.WriteMapNullValue);
+                    jsonString = JSON.toJSONString(imageProcessRequest);
             }
         } else {
             // 构建object_name: {userId}/{category}/{uuid}.png