diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/instances/model/relations/RelationManagement.java b/src/main/java/org/gcube/informationsystem/resourceregistry/instances/model/relations/RelationManagement.java
index b3053d8..ff7b0c0 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/instances/model/relations/RelationManagement.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/instances/model/relations/RelationManagement.java
@@ -215,9 +215,9 @@ public abstract class RelationManagement<T extends EntityManagement<? extends En
 	}
 	
 	protected void checkPropagationConstraint() throws ResourceRegistryException {
-		Object object = getElement().getProperty(Relation.PROPAGATION_CONSTRAINT);
+		Object object = getElement().getProperty(Relation.PROPAGATION_CONSTRAINT_PROPERTY);
 		PropagationConstraintOrient pc = getPropagationConstraint((ODocument) object);
-		getElement().setProperty(Relation.PROPAGATION_CONSTRAINT, pc, OType.EMBEDDED);
+		getElement().setProperty(Relation.PROPAGATION_CONSTRAINT_PROPERTY, pc, OType.EMBEDDED);
 	}
 	
 	@Override
@@ -269,11 +269,11 @@ public abstract class RelationManagement<T extends EntityManagement<? extends En
 		
 		try {
 			PropagationConstraint propagationConstraint = Utility.getPropertyDocument(PropagationConstraint.class, element,
-					Relation.PROPAGATION_CONSTRAINT);
+					Relation.PROPAGATION_CONSTRAINT_PROPERTY);
 			if(propagationConstraint.getAddConstraint() != null) {
 				addConstraint = propagationConstraint.getAddConstraint();
 			} else {
-				String error = String.format("%s.%s in %s is null. %s", Relation.PROPAGATION_CONSTRAINT,
+				String error = String.format("%s.%s in %s is null. %s", Relation.PROPAGATION_CONSTRAINT_PROPERTY,
 						PropagationConstraint.ADD_PROPERTY, Utility.toJsonString(element, true),
 						Utility.SHOULD_NOT_OCCUR_ERROR_MESSAGE);
 				logger.error(error);
@@ -281,7 +281,7 @@ public abstract class RelationManagement<T extends EntityManagement<? extends En
 			}
 		} catch(Exception e) {
 			String error = String.format("Error while getting %s from %s while performing AddToContext. %s",
-					Relation.PROPAGATION_CONSTRAINT, Utility.toJsonString(element, true),
+					Relation.PROPAGATION_CONSTRAINT_PROPERTY, Utility.toJsonString(element, true),
 					Utility.SHOULD_NOT_OCCUR_ERROR_MESSAGE);
 			logger.warn(error);
 			throw new ResourceRegistryException(error, e);
@@ -334,11 +334,11 @@ public abstract class RelationManagement<T extends EntityManagement<? extends En
 		
 		try {
 			PropagationConstraint propagationConstraint = Utility.getPropertyDocument(PropagationConstraint.class, element,
-					Relation.PROPAGATION_CONSTRAINT);
+					Relation.PROPAGATION_CONSTRAINT_PROPERTY);
 			if(propagationConstraint.getRemoveConstraint() != null) {
 				removeConstraint = propagationConstraint.getRemoveConstraint();
 			} else {
-				String error = String.format("%s.%s in %s is null. %s", Relation.PROPAGATION_CONSTRAINT,
+				String error = String.format("%s.%s in %s is null. %s", Relation.PROPAGATION_CONSTRAINT_PROPERTY,
 						PropagationConstraint.REMOVE_PROPERTY, Utility.toJsonString(element, true),
 						Utility.SHOULD_NOT_OCCUR_ERROR_MESSAGE);
 				logger.error(error);
@@ -346,7 +346,7 @@ public abstract class RelationManagement<T extends EntityManagement<? extends En
 			}
 		} catch(Exception e) {
 			String error = String.format("Error while getting %s from %s while performing RemoveFromContext. %s",
-					Relation.PROPAGATION_CONSTRAINT, Utility.toJsonString(element, true),
+					Relation.PROPAGATION_CONSTRAINT_PROPERTY, Utility.toJsonString(element, true),
 					Utility.SHOULD_NOT_OCCUR_ERROR_MESSAGE);
 			logger.error(error);
 			throw new ResourceRegistryException(error, e);
@@ -415,18 +415,18 @@ public abstract class RelationManagement<T extends EntityManagement<? extends En
 		
 		try {
 			PropagationConstraint propagationConstraint = Utility.getPropertyDocument(PropagationConstraint.class,
-					element, Relation.PROPAGATION_CONSTRAINT);
+					element, Relation.PROPAGATION_CONSTRAINT_PROPERTY);
 			if(propagationConstraint.getRemoveConstraint() != null) {
 				removeConstraint = propagationConstraint.getRemoveConstraint();
 			} else {
-				String error = String.format("%s.%s in %s is null. %s", Relation.PROPAGATION_CONSTRAINT,
+				String error = String.format("%s.%s in %s is null. %s", Relation.PROPAGATION_CONSTRAINT_PROPERTY,
 						PropagationConstraint.REMOVE_PROPERTY, Utility.toJsonString(element, true),
 						Utility.SHOULD_NOT_OCCUR_ERROR_MESSAGE);
 				logger.error(error);
 				throw new ResourceRegistryException(error);
 			}
 		} catch(Exception e) {
-			logger.warn("Error while getting {} from {}. Assuming {}. {}", Relation.PROPAGATION_CONSTRAINT,
+			logger.warn("Error while getting {} from {}. Assuming {}. {}", Relation.PROPAGATION_CONSTRAINT_PROPERTY,
 					Utility.toJsonString(element, true), removeConstraint, Utility.SHOULD_NOT_OCCUR_ERROR_MESSAGE);
 		}