diff --git a/navalplanner-business/src/main/resources/org/navalplanner/business/advance/entities/Advance.hbm.xml b/navalplanner-business/src/main/resources/org/navalplanner/business/advance/entities/Advance.hbm.xml
index 5156840ee..7da23bb9f 100644
--- a/navalplanner-business/src/main/resources/org/navalplanner/business/advance/entities/Advance.hbm.xml
+++ b/navalplanner-business/src/main/resources/org/navalplanner/business/advance/entities/Advance.hbm.xml
@@ -49,6 +49,7 @@
 
         <set name="advanceMeasurements"
              cascade="all,delete-orphan"
+             inverse="true"
              access="field"
              sort="org.navalplanner.business.advance.entities.AdvanceMeasurementComparator">
                 <key column="ADVANCE_ASSIGNMENT_ID" />