diff --git a/src/devices/nm-device.c b/src/devices/nm-device.c
index c08b93ebb6..8b99fc0ba8 100644
--- a/src/devices/nm-device.c
+++ b/src/devices/nm-device.c
@@ -11529,6 +11529,7 @@ queued_ip6_config_change (gpointer user_data)
 	NMDevicePrivate *priv;
 	GSList *iter;
 	gboolean need_ipv6ll = FALSE;
+	NMPlatform *platform;
 
 	g_return_val_if_fail (NM_IS_DEVICE (self), G_SOURCE_REMOVE);
 
@@ -11555,11 +11556,24 @@ queued_ip6_config_change (gpointer user_data)
 	} else
 		update_ip_config (self, AF_INET6, FALSE);
 
-	if (priv->state < NM_DEVICE_STATE_DEACTIVATING
-	    && nm_platform_link_get (nm_device_get_platform (self), priv->ifindex)) {
+	if (   priv->state < NM_DEVICE_STATE_DEACTIVATING
+	    && (platform = nm_device_get_platform (self))
+	    && nm_platform_link_get (platform, priv->ifindex)) {
 		/* Handle DAD failures */
 		for (iter = priv->dad6_failed_addrs; iter; iter = iter->next) {
-			const NMPlatformIP6Address *addr = NMP_OBJECT_CAST_IP6_ADDRESS (iter->data);
+			const NMPObject *obj = iter->data;
+			const NMPlatformIP6Address *addr = NMP_OBJECT_CAST_IP6_ADDRESS (obj);
+			const NMPlatformIP6Address *addr2;
+
+			addr2 = NMP_OBJECT_CAST_IP6_ADDRESS (nm_platform_lookup_obj (platform,
+			                                                             NMP_CACHE_ID_TYPE_OBJECT_TYPE,
+			                                                             obj));
+			if (   addr2
+			    && (   NM_FLAGS_HAS (addr2->n_ifa_flags, IFA_F_SECONDARY)
+			        || !NM_FLAGS_HAS (addr2->n_ifa_flags, IFA_F_DADFAILED))) {
+				/* the address still/again exists and is not in DADFAILED state. Skip it. */
+				continue;
+			}
 
 			_LOGI (LOGD_IP6, "ipv6: duplicate address check failed for the %s address",
 			       nm_platform_ip6_address_to_string (addr, NULL, 0));
diff --git a/src/platform/nmp-object.h b/src/platform/nmp-object.h
index 8414c1a57f..8c36e2e3d4 100644
--- a/src/platform/nmp-object.h
+++ b/src/platform/nmp-object.h
@@ -730,6 +730,16 @@ const NMDedupMultiEntry *nm_platform_lookup_entry (NMPlatform *platform,
                                                    NMPCacheIdType cache_id_type,
                                                    const NMPObject *obj);
 
+static inline const NMPObject *
+nm_platform_lookup_obj (NMPlatform *platform,
+                        NMPCacheIdType cache_id_type,
+                        const NMPObject *obj)
+{
+	return nm_dedup_multi_entry_get_obj (nm_platform_lookup_entry (platform,
+	                                                               cache_id_type,
+	                                                               obj));
+}
+
 static inline const NMDedupMultiHeadEntry *
 nm_platform_lookup_obj_type (NMPlatform *platform,
                              NMPObjectType obj_type)