diff --git a/api/core/rag/retrieval/dataset_retrieval.py b/api/core/rag/retrieval/dataset_retrieval.py
index b56ff9edef..8243170c62 100644
--- a/api/core/rag/retrieval/dataset_retrieval.py
+++ b/api/core/rag/retrieval/dataset_retrieval.py
@@ -57,7 +57,7 @@ from core.rag.retrieval.template_prompts import (
 from core.tools.signature import sign_upload_file
 from core.tools.utils.dataset_retriever.dataset_retriever_base_tool import DatasetRetrieverBaseTool
 from dify_graph.file import File, FileTransferMethod, FileType
-from dify_graph.model_runtime.entities.llm_entities import LLMResult, LLMUsage
+from dify_graph.model_runtime.entities.llm_entities import LLMMode, LLMResult, LLMUsage
 from dify_graph.model_runtime.entities.message_entities import PromptMessage, PromptMessageRole, PromptMessageTool
 from dify_graph.model_runtime.entities.model_entities import ModelFeature, ModelType
 from dify_graph.model_runtime.model_providers.__base.large_language_model import LargeLanguageModel
@@ -127,11 +127,12 @@ class DatasetRetrieval:
         metadata_filter_document_ids, metadata_condition = None, None
 
         if request.metadata_filtering_mode != "disabled":
-            # Convert workflow layer types to app_config layer types
-            if not request.metadata_model_config:
-                raise ValueError("metadata_model_config is required for this method")
+            app_metadata_model_config = ModelConfig(provider="", name="", mode=LLMMode.CHAT, completion_params={})
+            if request.metadata_filtering_mode == "automatic":
+                if not request.metadata_model_config:
+                    raise ValueError("metadata_model_config is required for this method")
 
-            app_metadata_model_config = ModelConfig.model_validate(request.metadata_model_config.model_dump())
+                app_metadata_model_config = ModelConfig.model_validate(request.metadata_model_config.model_dump())
 
             app_metadata_filtering_conditions = None
             if request.metadata_filtering_conditions is not None: