diff --git a/api/app/services/app_statistics_service.py b/api/app/services/app_statistics_service.py
index c2af9c72..9eefd343 100644
--- a/api/app/services/app_statistics_service.py
+++ b/api/app/services/app_statistics_service.py
@@ -203,7 +203,7 @@ class AppStatisticsService:
             end_date: 结束时间戳（毫秒）
         
         Returns:
-            统计数据字典
+            每日统计数据列表
         """
         # 将毫秒时间戳转换为 datetime
         start_time = datetime.fromtimestamp(start_date / 1000)
diff --git a/api/app/services/model_service.py b/api/app/services/model_service.py
index f41fc593..d0152573 100644
--- a/api/app/services/model_service.py
+++ b/api/app/services/model_service.py
@@ -652,10 +652,12 @@ class ModelApiKeyService:
     @staticmethod
     def record_api_key_usage(db: Session, api_key_id: uuid.UUID | None) -> bool:
         """记录API Key使用"""
-        success = ModelApiKeyRepository.update_usage(db, api_key_id)
-        if success:
-            db.commit()
-        return success
+        if not api_key_id:
+            success = ModelApiKeyRepository.update_usage(db, api_key_id)
+            if success:
+                db.commit()
+            return success
+        return False
 
     @staticmethod
     def get_a_api_key(db: Session, model_config_id: uuid.UUID) -> ModelApiKey: