diff --git a/api/core/app/app_config/easy_ui_based_app/dataset/manager.py b/api/core/app/app_config/easy_ui_based_app/dataset/manager.py
index 20189053f4..a5492d70bd 100644
--- a/api/core/app/app_config/easy_ui_based_app/dataset/manager.py
+++ b/api/core/app/app_config/easy_ui_based_app/dataset/manager.py
@@ -138,15 +138,12 @@ class DatasetConfigManager:
         if not config.get("dataset_configs"):
             config["dataset_configs"] = {"retrieval_model": "single"}
 
+        if not isinstance(config["dataset_configs"], dict):
+            raise ValueError("dataset_configs must be of object type")
+
         if not config["dataset_configs"].get("datasets"):
             config["dataset_configs"]["datasets"] = {"strategy": "router", "datasets": []}
 
-        if not isinstance(config["dataset_configs"], dict):
-            raise ValueError("dataset_configs must be of object type")
-
-        if not isinstance(config["dataset_configs"], dict):
-            raise ValueError("dataset_configs must be of object type")
-
         need_manual_query_datasets = config.get("dataset_configs") and config["dataset_configs"].get(
             "datasets", {}
         ).get("datasets")