diff --git a/src/main/java/com/smartharvester/service/MappingService.java b/src/main/java/com/smartharvester/service/MappingService.java
index 0cf20f11362653b27b1d352ea8533738387ba098..30ecb762e97e0a89daf79026480b3532515b14d8 100644
--- a/src/main/java/com/smartharvester/service/MappingService.java
+++ b/src/main/java/com/smartharvester/service/MappingService.java
@@ -233,7 +233,9 @@ public class MappingService {
                                     values.add(value);
                                     propertyValueMap.replace(path.getProperty(), values);
                                 } else {
-                                    propertyValueMap.put(path.getProperty(), List.of(value));
+                                    List<String> values = new ArrayList<>();
+                                    values.add(value);
+                                    propertyValueMap.put(path.getProperty(), values);
                                 }
                                 break;
                             } else if (jsonT.optString(list.get(i)) != null && jsonT.has(list.get(i))) {
@@ -243,7 +245,9 @@ public class MappingService {
                                     values.add(value);
                                     propertyValueMap.replace(path.getProperty(), values);
                                 } else {
-                                    propertyValueMap.put(path.getProperty(), List.of(value));
+                                    List<String> values = new ArrayList<>();
+                                    values.add(value);
+                                    propertyValueMap.put(path.getProperty(), values);
                                 }
                                 break;
                             } else {
@@ -259,7 +263,9 @@ public class MappingService {
                                                 values.add(value);
                                                 propertyValueMap.replace(path.getProperty(), values);
                                             } else {
-                                                propertyValueMap.put(path.getProperty(), List.of(value));
+                                                List<String> values = new ArrayList<>();
+                                                values.add(value);
+                                                propertyValueMap.put(path.getProperty(), values);
                                             }
                                         }