diff --git a/leshan-client-core/src/main/java/org/eclipse/leshan/client/util/LinkFormatHelper.java b/leshan-client-core/src/main/java/org/eclipse/leshan/client/util/LinkFormatHelper.java
index f07d38454c..afcf7dbe6c 100644
--- a/leshan-client-core/src/main/java/org/eclipse/leshan/client/util/LinkFormatHelper.java
+++ b/leshan-client-core/src/main/java/org/eclipse/leshan/client/util/LinkFormatHelper.java
@@ -48,7 +48,6 @@
 import org.eclipse.leshan.core.request.ContentFormat;
 import org.eclipse.leshan.core.request.ReadRequest;
 import org.eclipse.leshan.core.response.ReadResponse;
-import org.eclipse.leshan.core.util.StringUtils;
 
 /**
  * An Utility class which help to generate @{link Link} from {@link LwM2mObjectEnabler} and {@link LwM2mModel}.<br>
@@ -269,8 +268,14 @@ protected List<LwM2mAttribute<?>> getObjectAttributes(ObjectModel objectModel) {
     }
 
     protected Version getVersion(ObjectModel objectModel) {
-        if (StringUtils.isEmpty(objectModel.version) || ObjectModel.DEFAULT_VERSION.equals(objectModel.version)) {
-            return null;
+        if (versionRegistry.isCoreObject(objectModel.id, version)) {
+            if (versionRegistry.isDefaultVersion(new Version(objectModel.version), objectModel.id, version)) {
+                return null;
+            }
+        } else {
+            if (Version.V1_0.equals(new Version(objectModel.version))) {
+                return null;
+            }
         }
         return new Version(objectModel.version);
     }
diff --git a/leshan-core/src/main/java/org/eclipse/leshan/core/model/LwM2mCoreObjectVersionRegistry.java b/leshan-core/src/main/java/org/eclipse/leshan/core/model/LwM2mCoreObjectVersionRegistry.java
index 13f0954bc6..8d3f13b630 100644
--- a/leshan-core/src/main/java/org/eclipse/leshan/core/model/LwM2mCoreObjectVersionRegistry.java
+++ b/leshan-core/src/main/java/org/eclipse/leshan/core/model/LwM2mCoreObjectVersionRegistry.java
@@ -84,6 +84,11 @@ public Version getDefaultVersion(int objectId, LwM2mVersion lwM2mVersion) {
         return null;
     }
 
+    public boolean isCoreObject(int objectId, LwM2mVersion lwM2mVersion) {
+        Map<Integer, Version> objectIdToVersion = lwm2mVerionToObjectRegistry.get(lwM2mVersion);
+        return objectIdToVersion.get(objectId) != null;
+    }
+
     public boolean isDefaultVersion(Version objectVersion, int objectId, LwM2mVersion lwM2mVersion) {
         Map<Integer, Version> objectIdToVersion = lwm2mVerionToObjectRegistry.get(lwM2mVersion);
         if (objectIdToVersion != null) {
diff --git a/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/BootstrapTest.java b/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/BootstrapTest.java
index f9ab27ae78..8a685ed171 100644
--- a/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/BootstrapTest.java
+++ b/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/BootstrapTest.java
@@ -355,10 +355,10 @@ public void bootstrapWithDiscoverOnRoot(Protocol givenProtocol, String givenClie
         LwM2mResponse firstResponse = bootstrapServer.getFirstResponseFor(bootstrapSession, firstRequest);
         assertThat(firstResponse).isInstanceOfSatisfying(BootstrapDiscoverResponse.class, r -> {
             assertThat(r).hasCode(ResponseCode.CONTENT);
-            assertThat(r.getObjectLinks()).isLikeLwM2mLinks(String.format(
-                    "</>;lwm2m=1.0,</0>;ver=1.1,</0/0>;uri=\"coap://%s:%d\",</1>;ver=1.1,</2>,</3442/0>,</3>;ver=1.1,</3/0>",
-                    bootstrapServer.getEndpoint(givenProtocol).getURI().getHost(),
-                    bootstrapServer.getEndpoint(givenProtocol).getURI().getPort()));
+            assertThat(r.getObjectLinks()).isLikeLwM2mLinks(
+                    String.format("</>;lwm2m=1.0,</0/0>;uri=\"coap://%s:%d\",</1>,</2>,</3442/0>,</3/0>",
+                            bootstrapServer.getEndpoint(givenProtocol).getURI().getHost(),
+                            bootstrapServer.getEndpoint(givenProtocol).getURI().getPort()));
         });
     }
 
@@ -398,10 +398,10 @@ public void bootstrapWithDiscoverOnRootThenRebootstrap(Protocol givenProtocol, S
         LwM2mResponse firstResponse = bootstrapServer.getFirstResponseFor(bootstrapSession, firstRequest);
         assertThat(firstResponse).isInstanceOfSatisfying(BootstrapDiscoverResponse.class, r -> {
             assertThat(r).hasCode(ResponseCode.CONTENT);
-            assertThat(r.getObjectLinks()).isLikeLwM2mLinks(String.format(
-                    "</>;lwm2m=1.0,</0>;ver=1.1,</0/0>;uri=\"coap://%s:%d\",</1>;ver=1.1,</2>,</3442/0>,</3>;ver=1.1,</3/0>",
-                    bootstrapServer.getEndpoint(givenProtocol).getURI().getHost(),
-                    bootstrapServer.getEndpoint(givenProtocol).getURI().getPort()));
+            assertThat(r.getObjectLinks()).isLikeLwM2mLinks(
+                    String.format("</>;lwm2m=1.0,</0/0>;uri=\"coap://%s:%d\",</1>,</2>,</3442/0>,</3/0>",
+                            bootstrapServer.getEndpoint(givenProtocol).getURI().getHost(),
+                            bootstrapServer.getEndpoint(givenProtocol).getURI().getPort()));
         });
 
         // re-bootstrap
@@ -423,7 +423,7 @@ public void bootstrapWithDiscoverOnRootThenRebootstrap(Protocol givenProtocol, S
         assertThat(secondResponse).isInstanceOfSatisfying(BootstrapDiscoverResponse.class, r -> {
             assertThat(r).hasCode(ResponseCode.CONTENT);
             assertThat(r.getObjectLinks()).isLikeLwM2mLinks(String.format(
-                    "</>;lwm2m=1.0,</0>;ver=1.1,</0/0>;uri=\"coap://%s:%d\",</0/1>;ssid=2222;uri=\"coap://%s:%d\",</1>;ver=1.1,</1/0>;ssid=2222,</2>,</3442/0>,</3>;ver=1.1,</3/0>",
+                    "</>;lwm2m=1.0,</0/0>;uri=\"coap://%s:%d\",</0/1>;ssid=2222;uri=\"coap://%s:%d\",</1/0>;ssid=2222,</2>,</3442/0>,</3/0>",
                     bootstrapServer.getEndpoint(givenProtocol).getURI().getHost(),
                     bootstrapServer.getEndpoint(givenProtocol).getURI().getPort(),
                     server.getEndpoint(givenProtocol).getURI().getHost(),
@@ -467,7 +467,7 @@ public void bootstrapWithDiscoverOnDevice(Protocol givenProtocol, String givenCl
         LwM2mResponse firstResponse = bootstrapServer.getFirstResponseFor(bootstrapSession, firstRequest);
         assertThat(firstResponse).isInstanceOfSatisfying(BootstrapDiscoverResponse.class, r -> {
             assertThat(r).hasCode(ResponseCode.CONTENT);
-            assertThat(r.getObjectLinks()).isLikeLwM2mLinks("</>;lwm2m=1.0,</3>;ver=1.1,</3/0>");
+            assertThat(r.getObjectLinks()).isLikeLwM2mLinks("</>;lwm2m=1.0,</3/0>");
         });
     }
 
diff --git a/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/DiscoverTest.java b/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/DiscoverTest.java
index bff6a6c7b7..8f8935c226 100644
--- a/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/DiscoverTest.java
+++ b/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/DiscoverTest.java
@@ -101,8 +101,7 @@ public void can_discover_object(Protocol givenProtocol, String givenClientEndpoi
         assertThat(response) //
                 .hasCode(CONTENT) //
                 .hasValidUnderlyingResponseFor(givenServerEndpointProvider) // */
-                .hasObjectLinksLike(
-                        "</3>;ver=1.1,</3/0>,</3/0/0>,</3/0/1>,</3/0/2>,</3/0/11>,</3/0/14>,</3/0/15>,</3/0/16>");
+                .hasObjectLinksLike("</3>,</3/0>,</3/0/0>,</3/0/1>,</3/0/2>,</3/0/11>,</3/0/14>,</3/0/15>,</3/0/16>");
 
     }
 
diff --git a/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/QueueModeTest.java b/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/QueueModeTest.java
index 1eaba8e1a9..64e273921c 100644
--- a/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/QueueModeTest.java
+++ b/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/QueueModeTest.java
@@ -105,7 +105,7 @@ public void awake_sleeping_awake_sleeping(Protocol givenProtocol, String givenCl
         assertThat(client).isRegisteredAt(server);
         Registration registration = server.getRegistrationFor(client);
         assertThat(registration.getObjectLinks()).isLikeLinks(
-                "</>;rt=\"oma.lwm2m\";ct=\"60 110 112 1542 1543 11542 11543\",</1>;ver=1.1,</1/0>,</2>,</3>;ver=1.1,</3/0>,</3442/0>");
+                "</>;rt=\"oma.lwm2m\";ct=\"60 110 112 1542 1543 11542 11543\",</1/0>,</2>,</3/0>,</3442/0>");
 
         // Wait for client awake time expiration (20% margin)
         assertThat(client).after((long) (AWAKETIME * 0.8), TimeUnit.MILLISECONDS).isAwakeOn(server);
diff --git a/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/RegistrationTest.java b/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/RegistrationTest.java
index c1d563fa59..cea978a8fb 100644
--- a/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/RegistrationTest.java
+++ b/leshan-integration-tests/src/test/java/org/eclipse/leshan/integration/tests/RegistrationTest.java
@@ -148,7 +148,7 @@ public void register_update_deregister(Protocol protocol, String clientEndpointP
         assertThat(client).isRegisteredAt(server);
         Registration registration = server.getRegistrationFor(client);
         assertThat(registration.getObjectLinks()).isLikeLinks(
-                "</>;rt=\"oma.lwm2m\";ct=\"60 110 112 1542 1543 11542 11543\",</1>;ver=1.1,</1/0>,</2>,</3>;ver=1.1,</3/0>,</3442/0>");
+                "</>;rt=\"oma.lwm2m\";ct=\"60 110 112 1542 1543 11542 11543\",</1/0>,</2>,</3/0>,</3442/0>");
 
         // Check for update
         client.waitForUpdateTo(server, SHORT_LIFETIME, TimeUnit.SECONDS);