diff --git a/src/main/java/org/pasteque/common/datasource/AssociationInconsistencyException.java b/src/main/java/org/pasteque/common/datasource/AssociationInconsistencyException.java
index 2c63f03..700caaa 100644
--- a/src/main/java/org/pasteque/common/datasource/AssociationInconsistencyException.java
+++ b/src/main/java/org/pasteque/common/datasource/AssociationInconsistencyException.java
@@ -5,7 +5,7 @@ package org.pasteque.common.datasource;
  */
 public class AssociationInconsistencyException extends Exception
 {
-    private static final long serialVersionUID = -979786104345156783L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getFromField()} */
     private final String fromField;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/APIVersionDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/APIVersionDTO.java
index 9b63a36..405d9df 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/APIVersionDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/APIVersionDTO.java
@@ -16,7 +16,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public class APIVersionDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = 4654741357430549138L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getLevel()} */
     private final int level;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/CategoryDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/CategoryDTO.java
index 8e6f532..a5e6c95 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/CategoryDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/CategoryDTO.java
@@ -10,7 +10,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public class CategoryDTO extends CommonDTO implements Serializable
 {
-    private static final long serialVersionUID = 8211717550217795453L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getParent} */
     private final Integer parent;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/CompositionDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/CompositionDTO.java
index 8e0fe24..3e0d600 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/CompositionDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/CompositionDTO.java
@@ -10,7 +10,7 @@ import org.pasteque.coreutil.ImmutableList;
  */
 public class CompositionDTO extends ProductDTO implements Serializable
 {
-    private static final long serialVersionUID = -3223110713928387147L;
+    private static final long serialVersionUID = 1L;
 
     /** Always true */
     protected final boolean composition = true;
@@ -92,7 +92,7 @@ public class CompositionDTO extends ProductDTO implements Serializable
      */
     public class CompositionGroupDTO implements Serializable
     {
-        private static final long serialVersionUID = -5237752185922817170L;
+        private static final long serialVersionUID = 1L;
 
         /** {@see getLabel()} */
         private final String label;
@@ -144,7 +144,7 @@ public class CompositionDTO extends ProductDTO implements Serializable
      */
     public class CompositionProductDTO implements Serializable
     {
-        private static final long serialVersionUID = 4024627602322411550L;
+        private static final long serialVersionUID = 1L;
 
         /** {@see getProduct()} */
         private final int product;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/CurrencyDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/CurrencyDTO.java
index 8a6c6b8..7f70f38 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/CurrencyDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/CurrencyDTO.java
@@ -11,7 +11,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public class CurrencyDTO extends CommonDTO implements Serializable
 {
-    private static final long serialVersionUID = -6259735426241774167L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getSymbol()} */
     private final String symbol;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/CustomerDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/CustomerDTO.java
index f4e8848..673be01 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/CustomerDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/CustomerDTO.java
@@ -16,7 +16,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public class CustomerDTO extends CommonDTO implements Serializable
 {
-    private static final long serialVersionUID = 2904701878615495822L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getCard()} */
     private final String card;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/DiscountProfileDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/DiscountProfileDTO.java
index ba843ec..d21c853 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/DiscountProfileDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/DiscountProfileDTO.java
@@ -14,7 +14,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public class DiscountProfileDTO extends CommonDTO implements Serializable
 {
-    private static final long serialVersionUID = -2505636588019239236L;
+    private static final long serialVersionUID = 1L;
 
     /** See {@link getDiscountRate()}. */
     private final double discountRate;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/FloorDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/FloorDTO.java
index 9b85e60..2b086ff 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/FloorDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/FloorDTO.java
@@ -12,7 +12,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public class FloorDTO extends CommonDTO implements Serializable
 {
-    private static final long serialVersionUID = -4474106026709243994L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getPlaces()} */
     private final ImmutableList<PlaceDTO> places;
@@ -71,7 +71,7 @@ public class FloorDTO extends CommonDTO implements Serializable
      */
     public class PlaceDTO implements Serializable
     {
-        private static final long serialVersionUID = 8129968704161611106L;
+        private static final long serialVersionUID = 1L;
 
         /** {@see getLabel()} */
         private final String label;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/ImageDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/ImageDTO.java
index 9494eb4..e555dee 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/ImageDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/ImageDTO.java
@@ -20,7 +20,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public class ImageDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = -7807272808383007554L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getModel()} */
     private final String model;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/OptionDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/OptionDTO.java
index df4196b..c0ffd45 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/OptionDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/OptionDTO.java
@@ -16,7 +16,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public class OptionDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = 8951727299457218490L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getName()} */
     private final String name;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/OrderDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/OrderDTO.java
index 6d898d2..07a78c0 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/OrderDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/OrderDTO.java
@@ -15,7 +15,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public class OrderDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = -3898628758749878634L;
+    private static final long serialVersionUID = 1L;
 
     /** See {@link getId()}. */
     private final String id;
@@ -194,7 +194,7 @@ public class OrderDTO implements DTOInterface, Serializable
      */
     public class OrderLineDTO implements Serializable
     {
-        private static final long serialVersionUID = 8802466032089572015L;
+        private static final long serialVersionUID = 1L;
 
         /** See {@link getDispOrder()}. */
         private final int dispOrder;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/PaymentModeDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/PaymentModeDTO.java
index 2328e40..d5d17c8 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/PaymentModeDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/PaymentModeDTO.java
@@ -17,7 +17,7 @@ import org.pasteque.coreutil.ImmutableList;
  */
 public class PaymentModeDTO extends CommonDTO implements Serializable
 {
-    private static final long serialVersionUID = 5324960228614648256L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getBackLabel()} */
     private final String backLabel;
@@ -139,7 +139,7 @@ public class PaymentModeDTO extends CommonDTO implements Serializable
      */
     public class PaymentModeValueDTO implements Serializable
     {
-        private static final long serialVersionUID = 5503522521532600750L;
+        private static final long serialVersionUID = 1L;
 
         /** {@see getValue()} */
         private final double value;
@@ -195,7 +195,7 @@ public class PaymentModeDTO extends CommonDTO implements Serializable
      */
     public class PaymentModeReturnDTO implements Serializable
     {
-        private static final long serialVersionUID = -5076562956398887860L;
+        private static final long serialVersionUID = 1L;
 
         /** {@see getMinAmount()} */
         private double minAmount;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/ProductDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/ProductDTO.java
index 43f0606..a41d9f6 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/ProductDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/ProductDTO.java
@@ -9,7 +9,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public class ProductDTO extends CommonDTO implements Serializable
 {
-    private static final long serialVersionUID = -6083885399091129846L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getBarcode()} */
     protected final String barcode;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/ResourceDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/ResourceDTO.java
index 546d38a..0f87da0 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/ResourceDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/ResourceDTO.java
@@ -22,7 +22,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public class ResourceDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = -7746795788087018857L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getModel()} */
     private final String label;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/RoleDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/RoleDTO.java
index e50308e..8f541d9 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/RoleDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/RoleDTO.java
@@ -14,7 +14,7 @@ import org.pasteque.coreutil.ImmutableList;
  */
 public class RoleDTO extends CommonDTO implements Serializable
 {
-    private static final long serialVersionUID = 1835635017595972352L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getPermissions()} */
     private final ImmutableList<String> permissions;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/TariffAreaDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/TariffAreaDTO.java
index 3ed46b0..beae43f 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/TariffAreaDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/TariffAreaDTO.java
@@ -12,7 +12,7 @@ import org.pasteque.coreutil.ImmutableList;
  */
 public class TariffAreaDTO extends CommonDTO implements Serializable
 {
-    private static final long serialVersionUID = -2639559615366931293L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getSymbol()} */
     private final ImmutableList<TariffAreaPriceDTO> prices;
@@ -70,7 +70,7 @@ public class TariffAreaDTO extends CommonDTO implements Serializable
      */
     public class TariffAreaPriceDTO implements Serializable
     {
-        private static final long serialVersionUID = 3384262202026051762L;
+        private static final long serialVersionUID = 1L;
 
         /** See {@link getProduct()}. */
         private int product;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/TaxDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/TaxDTO.java
index 93e3959..7f9b13c 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/TaxDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/TaxDTO.java
@@ -14,7 +14,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public class TaxDTO extends CommonDTO implements Serializable
 {
-    private static final long serialVersionUID = 8232927221600250003L;
+    private static final long serialVersionUID = 1L;
 
     /** See {@link getTaxRate()}. */
     private final double taxRate;
diff --git a/src/main/java/org/pasteque/common/datatransfer/dto/UserDTO.java b/src/main/java/org/pasteque/common/datatransfer/dto/UserDTO.java
index 2409055..331cd6a 100644
--- a/src/main/java/org/pasteque/common/datatransfer/dto/UserDTO.java
+++ b/src/main/java/org/pasteque/common/datatransfer/dto/UserDTO.java
@@ -11,7 +11,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public class UserDTO extends CommonDTO implements Serializable
 {
-    private static final long serialVersionUID = 5162729826784894378L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getRole()} */
     private final int role;
diff --git a/src/main/java/org/pasteque/coreutil/ImmutableList.java b/src/main/java/org/pasteque/coreutil/ImmutableList.java
index e42d871..014426f 100644
--- a/src/main/java/org/pasteque/coreutil/ImmutableList.java
+++ b/src/main/java/org/pasteque/coreutil/ImmutableList.java
@@ -15,7 +15,7 @@ import java.util.function.Consumer;
  */
 public final class ImmutableList<T> implements Iterable<T>, Serializable
 {
-    private static final long serialVersionUID = 4982637247874555568L;
+    private static final long serialVersionUID = 1L;
 
     /** See {@link get(int)} or {@link iterator()}. */
     private List<T> content;
diff --git a/src/main/java/org/pasteque/coreutil/ParseException.java b/src/main/java/org/pasteque/coreutil/ParseException.java
index 25888fb..7c36d90 100644
--- a/src/main/java/org/pasteque/coreutil/ParseException.java
+++ b/src/main/java/org/pasteque/coreutil/ParseException.java
@@ -5,7 +5,7 @@ package org.pasteque.coreutil;
  */
 public class ParseException extends Exception
 {
-    private static final long serialVersionUID = 3552338953002779225L;
+    private static final long serialVersionUID = 1L;
 
     /**
      * Create a generic exception with only a message.
diff --git a/src/main/java/org/pasteque/coreutil/datatransfer/dto/CashRegisterDTO.java b/src/main/java/org/pasteque/coreutil/datatransfer/dto/CashRegisterDTO.java
index 2c0bff7..754f632 100644
--- a/src/main/java/org/pasteque/coreutil/datatransfer/dto/CashRegisterDTO.java
+++ b/src/main/java/org/pasteque/coreutil/datatransfer/dto/CashRegisterDTO.java
@@ -16,7 +16,7 @@ import org.pasteque.coreutil.extra.ExtraObject;
  */
 public final class CashRegisterDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = 1079581813013284003L;
+    private static final long serialVersionUID = 1L;
  
     /** See {@link getReference()}. */
     private String reference;
diff --git a/src/main/java/org/pasteque/coreutil/datatransfer/dto/CashSessionDTO.java b/src/main/java/org/pasteque/coreutil/datatransfer/dto/CashSessionDTO.java
index a62f626..1efabea 100644
--- a/src/main/java/org/pasteque/coreutil/datatransfer/dto/CashSessionDTO.java
+++ b/src/main/java/org/pasteque/coreutil/datatransfer/dto/CashSessionDTO.java
@@ -18,7 +18,7 @@ import org.pasteque.coreutil.extra.ExtraObject;
  */
 public final class CashSessionDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = 2312930086844551950L;
+    private static final long serialVersionUID = 1L;
 
     /** See {@link getCashRegister()}. */
     private WeakAssociationDTO cashRegister;
diff --git a/src/main/java/org/pasteque/coreutil/datatransfer/dto/FiscalTicketDTO.java b/src/main/java/org/pasteque/coreutil/datatransfer/dto/FiscalTicketDTO.java
index b78b07f..a5fb5e8 100644
--- a/src/main/java/org/pasteque/coreutil/datatransfer/dto/FiscalTicketDTO.java
+++ b/src/main/java/org/pasteque/coreutil/datatransfer/dto/FiscalTicketDTO.java
@@ -30,7 +30,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public final class FiscalTicketDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = 1622469748625149642L;
+    private static final long serialVersionUID = 1L;
 
     /** See {@link getType()}. */
     private String type;
diff --git a/src/main/java/org/pasteque/coreutil/datatransfer/dto/MovementDTO.java b/src/main/java/org/pasteque/coreutil/datatransfer/dto/MovementDTO.java
index 9999d2d..99c6731 100644
--- a/src/main/java/org/pasteque/coreutil/datatransfer/dto/MovementDTO.java
+++ b/src/main/java/org/pasteque/coreutil/datatransfer/dto/MovementDTO.java
@@ -17,7 +17,7 @@ import org.pasteque.coreutil.extra.ExtraObject;
  */
 public final class MovementDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = 2409481140667639418L;
+    private static final long serialVersionUID = 1L;
 
     /** See {@link getPaymentMode()}. */
     private WeakAssociationDTO paymentMode;
diff --git a/src/main/java/org/pasteque/coreutil/datatransfer/dto/PaymentDTO.java b/src/main/java/org/pasteque/coreutil/datatransfer/dto/PaymentDTO.java
index afd10e5..d76dc3f 100644
--- a/src/main/java/org/pasteque/coreutil/datatransfer/dto/PaymentDTO.java
+++ b/src/main/java/org/pasteque/coreutil/datatransfer/dto/PaymentDTO.java
@@ -15,7 +15,7 @@ import org.pasteque.coreutil.extra.ExtraObject;
  */
 public final class PaymentDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = 3195260108460565293L;
+    private static final long serialVersionUID = 1L;
 
     /** See {@link getPaymentMode()}. */
     private WeakAssociationDTO paymentMode;
diff --git a/src/main/java/org/pasteque/coreutil/datatransfer/dto/TaxAmountDTO.java b/src/main/java/org/pasteque/coreutil/datatransfer/dto/TaxAmountDTO.java
index 37bb238..7e8de81 100644
--- a/src/main/java/org/pasteque/coreutil/datatransfer/dto/TaxAmountDTO.java
+++ b/src/main/java/org/pasteque/coreutil/datatransfer/dto/TaxAmountDTO.java
@@ -15,7 +15,7 @@ import org.pasteque.coreutil.extra.ExtraObject;
  */
 public final class TaxAmountDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = 7429827880917696693L;
+    private static final long serialVersionUID = 1L;
 
     /** See {@link getTax()}. */
     private WeakAssociationDTO tax;
diff --git a/src/main/java/org/pasteque/coreutil/datatransfer/dto/TaxDTO.java b/src/main/java/org/pasteque/coreutil/datatransfer/dto/TaxDTO.java
index d40551a..d4e8f1a 100644
--- a/src/main/java/org/pasteque/coreutil/datatransfer/dto/TaxDTO.java
+++ b/src/main/java/org/pasteque/coreutil/datatransfer/dto/TaxDTO.java
@@ -11,7 +11,7 @@ import org.pasteque.coreutil.extra.ExtraObject;
  */
 public final class TaxDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = 525507510660586665L;
+    private static final long serialVersionUID = 1L;
     /** See {@link getType()}. */
     private String type;
     /** See {@link getAmount()}. */
diff --git a/src/main/java/org/pasteque/coreutil/datatransfer/dto/TicketDTO.java b/src/main/java/org/pasteque/coreutil/datatransfer/dto/TicketDTO.java
index 30a7958..69e1e47 100644
--- a/src/main/java/org/pasteque/coreutil/datatransfer/dto/TicketDTO.java
+++ b/src/main/java/org/pasteque/coreutil/datatransfer/dto/TicketDTO.java
@@ -18,7 +18,7 @@ import org.pasteque.coreutil.extra.ExtraObject;
  */
 public final class TicketDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = 8831777799341373103L;
+    private static final long serialVersionUID = 1L;
 
     /** See {@link getCashRegister()}. */
     private WeakAssociationDTO cashRegister;
@@ -341,7 +341,7 @@ public final class TicketDTO implements DTOInterface, Serializable
      */
     public class TicketLineDTO implements DTOInterface, Serializable
     {
-        private static final long serialVersionUID = -9065013247136552814L;
+        private static final long serialVersionUID = 1L;
 
         /** See {@link getDispOrder()}. */
         private final int dispOrder;
diff --git a/src/main/java/org/pasteque/coreutil/datatransfer/dto/WeakAssociationDTO.java b/src/main/java/org/pasteque/coreutil/datatransfer/dto/WeakAssociationDTO.java
index f809df8..2aadf67 100644
--- a/src/main/java/org/pasteque/coreutil/datatransfer/dto/WeakAssociationDTO.java
+++ b/src/main/java/org/pasteque/coreutil/datatransfer/dto/WeakAssociationDTO.java
@@ -12,7 +12,7 @@ import org.pasteque.coreutil.datatransfer.parser.Reader;
  */
 public class WeakAssociationDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = -4033459839844194734L;
+    private static final long serialVersionUID = 1L;
 
     /** See {@link getReference()}. */
     private final String reference;
diff --git a/src/main/java/org/pasteque/coreutil/datatransfer/dto/ZTicketDTO.java b/src/main/java/org/pasteque/coreutil/datatransfer/dto/ZTicketDTO.java
index 0c185a7..98d4b1b 100644
--- a/src/main/java/org/pasteque/coreutil/datatransfer/dto/ZTicketDTO.java
+++ b/src/main/java/org/pasteque/coreutil/datatransfer/dto/ZTicketDTO.java
@@ -23,7 +23,7 @@ import org.pasteque.coreutil.extra.ExtraObject;
  */
 public final class ZTicketDTO implements DTOInterface, Serializable
 {
-    private static final long serialVersionUID = -2784800199238764159L;
+    private static final long serialVersionUID = 1L;
 
     /** See {@link getCashRegister()}. */
     private WeakAssociationDTO cashRegister;
@@ -379,7 +379,7 @@ public final class ZTicketDTO implements DTOInterface, Serializable
      */
     public class ZTicketCatSalesDTO implements DTOInterface, Serializable
     {
-        private static final long serialVersionUID = -6392552469204214096L;
+        private static final long serialVersionUID = 1L;
 
         /** See {@link getCategory()}. */
         private final WeakAssociationDTO category;
@@ -441,7 +441,7 @@ public final class ZTicketDTO implements DTOInterface, Serializable
      */
     public class ZTicketCatTaxesDTO implements DTOInterface, Serializable
     {
-        private static final long serialVersionUID = -8934368775977813408L;
+        private static final long serialVersionUID = 1L;
 
         /** See {@link getCategory()}. */
         private final WeakAssociationDTO category;
@@ -531,7 +531,7 @@ public final class ZTicketDTO implements DTOInterface, Serializable
      */
     public class ZTicketCustBalanceDTO implements DTOInterface, Serializable
     {
-        private static final long serialVersionUID = 7698608167553284402L;
+        private static final long serialVersionUID = 1L;
 
         /** See {@link getCustomer()}. */
         private final WeakAssociationDTO customer;
diff --git a/src/main/java/org/pasteque/coreutil/datatransfer/integrity/IntegrityException.java b/src/main/java/org/pasteque/coreutil/datatransfer/integrity/IntegrityException.java
index 5994e33..cca1d8a 100644
--- a/src/main/java/org/pasteque/coreutil/datatransfer/integrity/IntegrityException.java
+++ b/src/main/java/org/pasteque/coreutil/datatransfer/integrity/IntegrityException.java
@@ -5,7 +5,7 @@ package org.pasteque.coreutil.datatransfer.integrity;
  */
 public abstract class IntegrityException extends Exception
 {
-    private static final long serialVersionUID = 6208213847306142896L;
+    private static final long serialVersionUID = 1L;
 
     /** {@inheritDoc} */
     public IntegrityException() {
diff --git a/src/main/java/org/pasteque/coreutil/datatransfer/integrity/IntegrityExceptions.java b/src/main/java/org/pasteque/coreutil/datatransfer/integrity/IntegrityExceptions.java
index 7b80723..2954776 100644
--- a/src/main/java/org/pasteque/coreutil/datatransfer/integrity/IntegrityExceptions.java
+++ b/src/main/java/org/pasteque/coreutil/datatransfer/integrity/IntegrityExceptions.java
@@ -8,7 +8,7 @@ import java.util.List;
  */
 public class IntegrityExceptions extends Exception
 {
-    private static final long serialVersionUID = -2603644891253059810L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getCauses()} */
     private IntegrityException[] causes;
diff --git a/src/main/java/org/pasteque/coreutil/datatransfer/integrity/InvalidFieldException.java b/src/main/java/org/pasteque/coreutil/datatransfer/integrity/InvalidFieldException.java
index 22eb125..d2dc15d 100644
--- a/src/main/java/org/pasteque/coreutil/datatransfer/integrity/InvalidFieldException.java
+++ b/src/main/java/org/pasteque/coreutil/datatransfer/integrity/InvalidFieldException.java
@@ -5,7 +5,7 @@ package org.pasteque.coreutil.datatransfer.integrity;
  */
 public class InvalidFieldException extends IntegrityException
 {
-    private static final long serialVersionUID = 2512125224337518801L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getConstraint()} */
     private final IntegrityFieldConstraint constraint;
diff --git a/src/main/java/org/pasteque/coreutil/datatransfer/integrity/InvalidRecordException.java b/src/main/java/org/pasteque/coreutil/datatransfer/integrity/InvalidRecordException.java
index 337b48a..6642f55 100644
--- a/src/main/java/org/pasteque/coreutil/datatransfer/integrity/InvalidRecordException.java
+++ b/src/main/java/org/pasteque/coreutil/datatransfer/integrity/InvalidRecordException.java
@@ -6,7 +6,7 @@ package org.pasteque.coreutil.datatransfer.integrity;
  */
 public class InvalidRecordException extends IntegrityException
 {
-    private static final long serialVersionUID = -6234201939816973179L;
+    private static final long serialVersionUID = 1L;
 
     /** {@see getConstraint()} */
     private final IntegrityRecordConstraint constraint;