diff --git a/runtime/datamate-python/app/module/dataset/schema/dataset_file.py b/runtime/datamate-python/app/module/dataset/schema/dataset_file.py
index f31bba84..e387f9a0 100644
--- a/runtime/datamate-python/app/module/dataset/schema/dataset_file.py
+++ b/runtime/datamate-python/app/module/dataset/schema/dataset_file.py
@@ -46,7 +46,7 @@ def get_tags(self) -> List[str]:
             tags.append(tag_values)
         # 如果 from_name 不为空，添加前缀
         if self.from_name:
-            tags = [f"{self.from_name}@{tag}" for tag in tags]
+            tags = [{"label": self.from_name, "value": tag} for tag in tags]
         return tags
 
 
diff --git a/runtime/datamate-python/app/module/ratio/service/ratio_task.py b/runtime/datamate-python/app/module/ratio/service/ratio_task.py
index 943d23b0..be8d001d 100644
--- a/runtime/datamate-python/app/module/ratio/service/ratio_task.py
+++ b/runtime/datamate-python/app/module/ratio/service/ratio_task.py
@@ -61,7 +61,7 @@ async def create_task(
                     'label': {
                         "label":item.get("filter_conditions").label.label,
                         "value":item.get("filter_conditions").label.value,
-                    },
+                    } if item.get("filter_conditions").label else None,
                 })
             )
             logger.info(f"Relation created: {relation.id}, {relation}, {item}, {config}")
@@ -147,6 +147,7 @@ async def handle_ratio_relations(relations: list[RatioRelation], session, target
             select(DatasetFiles.file_path).where(DatasetFiles.dataset_id == target_ds.id)
         )
         existing_paths = set(p for p in existing_path_rows.scalars().all() if p)
+        source_paths = set()
 
         added_count = 0
         added_size = 0
@@ -164,10 +165,13 @@ async def handle_ratio_relations(relations: list[RatioRelation], session, target
             chosen = random.sample(files, pick_n) if pick_n < len(files) else files
 
             # Copy into target dataset with de-dup by target path
-            for f in chosen:
-                await RatioTaskService.handle_selected_file(existing_paths, f, session, target_ds)
+            for file in chosen:
+                if file.file_path in source_paths:
+                    continue
+                await RatioTaskService.handle_selected_file(existing_paths, file, session, target_ds)
+                source_paths.add(file.file_path)
                 added_count += 1
-                added_size += int(f.file_size or 0)
+                added_size += int(file.file_size or 0)
 
             # Periodically flush to avoid huge transactions
             await session.flush()
@@ -286,8 +290,15 @@ def _filter_file(file: DatasetFiles, conditions: FilterCondition) -> bool:
                 return False
             try:
                 # tags could be a list of strings or list of objects with 'name'
-                tag_names = RatioTaskService.get_all_tags(tags)
-                return f"{conditions.label.label}@{conditions.label.value}" in tag_names
+                all_tags = RatioTaskService.get_all_tags(tags)
+                for tag in all_tags:
+                    if conditions.label.label and tag.get("label") != conditions.label.label:
+                        continue
+                    if conditions.label.value is not None:
+                        return True
+                    if tag.get("value") == conditions.label.value:
+                        return True
+                return False
             except Exception as e:
                 logger.exception(f"Failed to get tags for {file}", e)
                 return False
@@ -295,9 +306,9 @@ def _filter_file(file: DatasetFiles, conditions: FilterCondition) -> bool:
         return True
 
     @staticmethod
-    def get_all_tags(tags) -> set[str]:
+    def get_all_tags(tags) -> list[dict]:
         """获取所有处理后的标签字符串列表"""
-        all_tags = set()
+        all_tags = list()
         if not tags:
             return all_tags
 
@@ -314,5 +325,5 @@ def get_all_tags(tags) -> set[str]:
 
         for file_tag in file_tags:
             for tag_data in file_tag.get_tags():
-                all_tags.add(tag_data)
+                all_tags.append(tag_data)
         return all_tags