diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/calendars/daos/CalendarExceptionTypeDAO.java b/navalplanner-business/src/main/java/org/navalplanner/business/calendars/daos/CalendarExceptionTypeDAO.java
index 5e8915005..8642f5e3a 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/calendars/daos/CalendarExceptionTypeDAO.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/calendars/daos/CalendarExceptionTypeDAO.java
@@ -82,7 +82,7 @@ public class CalendarExceptionTypeDAO extends
     @Override
     public boolean existsByName(String name) {
         try {
-            findByName(name);
+            findUniqueByName(name);
             return true;
         } catch (InstanceNotFoundException e) {
             return false;
@@ -91,7 +91,7 @@ public class CalendarExceptionTypeDAO extends
 
     @Override
     @Transactional(readOnly = true)
-    public CalendarExceptionType findByName(String name) throws InstanceNotFoundException {
+    public CalendarExceptionType findUniqueByName(String name) throws InstanceNotFoundException {
         if (StringUtils.isBlank(name)) {
             throw new InstanceNotFoundException(null, CalendarExceptionType.class.getName());
         }
@@ -109,4 +109,11 @@ public class CalendarExceptionTypeDAO extends
 
     }
 
+    @Override
+    @Transactional(readOnly = true, propagation = Propagation.REQUIRES_NEW)
+    public CalendarExceptionType findUniqueByNameAnotherTransaction(String name)
+            throws InstanceNotFoundException {
+        return findUniqueByName(name);
+    }
+
 }
diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/calendars/daos/ICalendarExceptionTypeDAO.java b/navalplanner-business/src/main/java/org/navalplanner/business/calendars/daos/ICalendarExceptionTypeDAO.java
index b3e56f0d2..ad2b169c2 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/calendars/daos/ICalendarExceptionTypeDAO.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/calendars/daos/ICalendarExceptionTypeDAO.java
@@ -44,8 +44,11 @@ public interface ICalendarExceptionTypeDAO extends
 
     boolean existsByNameAnotherTransaction(String name);
 
-    CalendarExceptionType findByName(String name) throws InstanceNotFoundException;
+    CalendarExceptionType findUniqueByName(String name) throws InstanceNotFoundException;
 
     boolean existsByName(String name);
 
+    CalendarExceptionType findUniqueByNameAnotherTransaction(String name)
+            throws InstanceNotFoundException;
+
 }
diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/calendars/entities/CalendarExceptionType.java b/navalplanner-business/src/main/java/org/navalplanner/business/calendars/entities/CalendarExceptionType.java
index 005b0990b..dd0a143a1 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/calendars/entities/CalendarExceptionType.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/calendars/entities/CalendarExceptionType.java
@@ -167,7 +167,8 @@ public class CalendarExceptionType extends IntegrationEntity {
                     name);
         } else {
             try {
-                CalendarExceptionType calendarExceptionType = calendarExceptionTypeDAO.findByName(name);
+                CalendarExceptionType calendarExceptionType = calendarExceptionTypeDAO
+                        .findUniqueByNameAnotherTransaction(name);
                 return calendarExceptionType.getId().equals(getId());
             } catch (InstanceNotFoundException e) {
                 return true;