diff --git a/navalplanner-business/src/main/resources/org/navalplanner/business/workreports/entities/WorkReports.hbm.xml b/navalplanner-business/src/main/resources/org/navalplanner/business/workreports/entities/WorkReports.hbm.xml
index 5aef862b4..d5007c0f8 100644
--- a/navalplanner-business/src/main/resources/org/navalplanner/business/workreports/entities/WorkReports.hbm.xml
+++ b/navalplanner-business/src/main/resources/org/navalplanner/business/workreports/entities/WorkReports.hbm.xml
@@ -30,7 +30,7 @@
 
     <many-to-one name="workReportType" class="WorkReportType" column="WORK_REPORT_TYPE_ID" not-null="true"/>
 
-    <set name="workReportLines" cascade="all" inverse="false">
+    <set name="workReportLines" cascade="all-delete-orphan" inverse="false">
         <key column="WORK_REPORT_ID"/>
         <one-to-many class="WorkReportLine"/>
     </set>