diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/er/ERManagement.java b/src/main/java/org/gcube/informationsystem/resourceregistry/er/ERManagement.java
index 3917bc0..b49a3b6 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/er/ERManagement.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/er/ERManagement.java
@@ -429,16 +429,10 @@ public abstract class ERManagement<ERType extends ER, El extends Element> {
 		}
 	}
 	
-	public boolean exists(boolean writer)
+	public boolean exists()
 			throws NotFoundException, AvailableInAnotherContextException, ResourceRegistryException {
 		try {
-			if(writer) {
-				// Exists is used to understand if it is a create or update. 
-				// In any case the we need writing right on this instance
-				orientGraph = getWorkingContext().getGraph(PermissionMode.WRITER);
-			}else {
-				orientGraph = getWorkingContext().getGraph(PermissionMode.READER);
-			}
+			orientGraph = getWorkingContext().getGraph(PermissionMode.READER);
 			
 			getElement();
 			
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java
index 2ae3d99..639b1a2 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java
@@ -209,7 +209,7 @@ public class Access {
 		
 		try {
 			erManagement.setUUID(UUID.fromString(uuid));
-			boolean found = erManagement.exists(false);
+			boolean found = erManagement.exists();
 			if(found) {
 				return Response.status(Status.NO_CONTENT).build();
 			} else {
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/InstancesManager.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/InstancesManager.java
index 6177cc3..f1bb85c 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/InstancesManager.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/InstancesManager.java
@@ -99,7 +99,7 @@ public class InstancesManager {
 		
 		try {
 			erManagement.setUUID(UUID.fromString(uuid));
-			boolean found = erManagement.exists(false);
+			boolean found = erManagement.exists();
 			if(found) {
 				return Response.status(Status.NO_CONTENT).build();
 			} else {
@@ -155,18 +155,19 @@ public class InstancesManager {
 		logger.trace("Requested to update/create {} with id {} with json {}", type, uuid, json);
 		setCalledMethod(HTTPMETHOD.PUT, type, true);
 		
-		@SuppressWarnings("rawtypes")
-		ERManagement erManagement = ERManagementUtility.getERManagement(type);
-		
-		erManagement.setUUID(UUID.fromString(uuid));
-		
 		boolean create = false;
 		try {
-			erManagement.exists(true);
+			@SuppressWarnings("rawtypes")
+			ERManagement erManagement = ERManagementUtility.getERManagement(type);
+			erManagement.setUUID(UUID.fromString(uuid));
+			erManagement.exists();
 		} catch(NotFoundException e) {
 			create = true;
 		}
 		
+		@SuppressWarnings("rawtypes")
+		ERManagement erManagement = ERManagementUtility.getERManagement(type);
+		erManagement.setUUID(UUID.fromString(uuid));
 		erManagement.setElementType(type);
 		erManagement.setJSON(json);
 		if(create) {