diff --git a/source/java/org/alfresco/rest/api/nodes/NodeTargetsRelation.java b/source/java/org/alfresco/rest/api/nodes/NodeTargetsRelation.java
index 7eff382d00..4c67c5e14b 100644
--- a/source/java/org/alfresco/rest/api/nodes/NodeTargetsRelation.java
+++ b/source/java/org/alfresco/rest/api/nodes/NodeTargetsRelation.java
@@ -92,7 +92,7 @@ public class NodeTargetsRelation extends AbstractNodeRelation implements
             }
             catch (AssociationExistsException aee)
             {
-                throw new ConstraintViolatedException(aee.getMessage());
+                throw new ConstraintViolatedException("Node association '"+assocTypeStr+"' already exists from "+sourceNodeId+" to "+targetNodeId);
             }
             catch (IllegalArgumentException iae)
             {