diff --git a/app/src/main/java/it/integry/integrywmsnative/gest/prod_recupero_materiale/rest/ProdRecuperoMaterialeRESTConsumer.java b/app/src/main/java/it/integry/integrywmsnative/gest/prod_recupero_materiale/rest/ProdRecuperoMaterialeRESTConsumer.java
index f17b94d4..89f4a8b5 100644
--- a/app/src/main/java/it/integry/integrywmsnative/gest/prod_recupero_materiale/rest/ProdRecuperoMaterialeRESTConsumer.java
+++ b/app/src/main/java/it/integry/integrywmsnative/gest/prod_recupero_materiale/rest/ProdRecuperoMaterialeRESTConsumer.java
@@ -44,14 +44,16 @@ public class ProdRecuperoMaterialeRESTConsumer extends _BaseRESTConsumer {
         List<HistoryVersamentoProdULDTO> newUlList = new ArrayList<>();
 
         Map<HashMap<String, Object>, List<HistoryVersamentoProdULRestDTO>> ulListGrouped = ulList.stream()
-                .collect(Collectors.groupingBy(x -> new HashMap<>() {{
-                    put("gestione", x.getGestione());
-                    put("data_collo", x.getDataCollo());
-                    put("ser_collo", x.getSerCollo());
-                    put("num_collo", x.getNumCollo());
-                    put("cod_mart", x.getCodMart());
-                    put("barcode_ul_out", x.getBarcodeUlOut());
-                }}, Collectors.toList()));
+                .collect(Collectors.groupingBy(x -> {
+                    var keyMap = new HashMap<String, Object>();
+                    keyMap.put("gestione", x.getGestione());
+                    keyMap.put("data_collo", x.getDataCollo());
+                    keyMap.put("ser_collo", x.getSerCollo());
+                    keyMap.put("num_collo", x.getNumCollo());
+                    keyMap.put("cod_mart", x.getCodMart());
+                    keyMap.put("barcode_ul_out", x.getBarcodeUlOut());
+                    return keyMap;
+                }, Collectors.toList()));
 
 
         ulListGrouped.forEach((key, value) -> {