diff --git a/src/main/java/com/kamco/cd/training/postgres/core/ModelTrainMngCoreService.java b/src/main/java/com/kamco/cd/training/postgres/core/ModelTrainMngCoreService.java
index 0a331d4..fd75953 100644
--- a/src/main/java/com/kamco/cd/training/postgres/core/ModelTrainMngCoreService.java
+++ b/src/main/java/com/kamco/cd/training/postgres/core/ModelTrainMngCoreService.java
@@ -504,6 +504,7 @@ public class ModelTrainMngCoreService {
     return datasetRepository.findDatasetUid(datasetIds);
   }
 
+  @Transactional(readOnly = true)
   public List<Long> findModelDatasetMapp(Long modelId) {
     List<Long> datasetUids = new ArrayList<>();
     List<ModelDatasetMappEntity> entities = modelDatasetMapRepository.findByModelUid(modelId);