diff --git a/dmp-backend/web/src/main/java/eu/eudat/logic/mapper/prefilling/PrefillingMapper.java b/dmp-backend/web/src/main/java/eu/eudat/logic/mapper/prefilling/PrefillingMapper.java
index a1fae4005..a6b4d2ea3 100644
--- a/dmp-backend/web/src/main/java/eu/eudat/logic/mapper/prefilling/PrefillingMapper.java
+++ b/dmp-backend/web/src/main/java/eu/eudat/logic/mapper/prefilling/PrefillingMapper.java
@@ -25,6 +25,8 @@ import eu.eudat.models.data.datasetwizard.DatasetWizardModel;
 import eu.eudat.models.data.externaldataset.ExternalAutocompleteFieldModel;
 import eu.eudat.models.data.license.LicenseModel;
 import org.json.JSONObject;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
@@ -34,6 +36,7 @@ import java.util.*;
 import java.util.stream.Collectors;
 
 public class PrefillingMapper {
+    private static final Logger logger = LoggerFactory.getLogger(PrefillingMapper.class);
     private static final ObjectMapper mapper = new ObjectMapper().configure(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true);
 
     public static DatasetWizardModel mapPrefilledEntityToDatasetWizard(Map<String, Object> prefilledEntity, PrefillingGet prefillingGet, String type,