diff --git a/libreplan-business/src/main/java/org/libreplan/business/calendars/entities/CalendarBootstrap.java b/libreplan-business/src/main/java/org/libreplan/business/calendars/entities/CalendarBootstrap.java
index 64d7f5143..fe3c32428 100644
--- a/libreplan-business/src/main/java/org/libreplan/business/calendars/entities/CalendarBootstrap.java
+++ b/libreplan-business/src/main/java/org/libreplan/business/calendars/entities/CalendarBootstrap.java
@@ -59,9 +59,8 @@ public class CalendarBootstrap implements ICalendarBootstrap {
                 calendarExceptionTypeDAO.save(calendarExceptionType);
             }
         }
-        if (!calendarExceptionTypeDAO.getAll().contains(
-                PredefinedCalendarExceptionTypes.NOT_WORKING_DAY
-                        .getCalendarExceptionType())) {
+        if (!calendarExceptionTypeDAO.existsByName(PredefinedCalendarExceptionTypes.NOT_WORKING_DAY
+                .getCalendarExceptionType())) {
             CalendarExceptionType calendarExceptionType = PredefinedCalendarExceptionTypes.NOT_WORKING_DAY
                     .getCalendarExceptionType();
             calendarExceptionType
@@ -70,8 +69,7 @@ public class CalendarBootstrap implements ICalendarBootstrap {
             calendarExceptionType.setCodeAutogenerated(true);
             calendarExceptionTypeDAO.save(calendarExceptionType);
         }
-        if (!calendarExceptionTypeDAO.getAll().contains(
-                PredefinedCalendarExceptionTypes.WORKING_DAY
+        if (!calendarExceptionTypeDAO.existsByName(PredefinedCalendarExceptionTypes.WORKING_DAY
                         .getCalendarExceptionType())) {
             CalendarExceptionType calendarExceptionType = PredefinedCalendarExceptionTypes.WORKING_DAY
                     .getCalendarExceptionType();