diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderLineGroup.java b/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderLineGroup.java
index f08a8c0bc..6d3ece7e6 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderLineGroup.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderLineGroup.java
@@ -823,7 +823,8 @@ public class OrderLineGroup extends OrderElement implements
 
     public void addIndirectAdvanceAssignment(
             IndirectAdvanceAssignment indirectAdvanceAssignment) {
-        if (!existsIndirectAdvanceAssignmentWithTheSameType(indirectAdvanceAssignment)) {
+        if (!existsIndirectAdvanceAssignmentWithTheSameType(indirectAdvanceAssignment
+                .getAdvanceType())) {
             indirectAdvanceAssignments.add(indirectAdvanceAssignment);
         }
         if (parent != null) {
@@ -863,19 +864,6 @@ public class OrderLineGroup extends OrderElement implements
         }
     }
 
-    private boolean existsIndirectAdvanceAssignmentWithTheSameType(
-            IndirectAdvanceAssignment newIndirectAdvanceAssignment) {
-        String unitName = newIndirectAdvanceAssignment.getAdvanceType()
-                .getUnitName();
-        for (IndirectAdvanceAssignment indirectAdvanceAssignment : indirectAdvanceAssignments) {
-            if (unitName.equals(indirectAdvanceAssignment.getAdvanceType()
-                    .getUnitName())) {
-                return true;
-            }
-        }
-        return false;
-    }
-
     public boolean existsIndirectAdvanceAssignmentWithTheSameType(
             AdvanceType type) {
         String unitName = type.getUnitName();