diff --git a/doc/notification_samples/aggregate-create-end.json b/doc/notification_samples/aggregate-create-end.json
index ded886cab..ab48994fa 100644
--- a/doc/notification_samples/aggregate-create-end.json
+++ b/doc/notification_samples/aggregate-create-end.json
@@ -1,7 +1,7 @@
 {
     "priority": "INFO",
     "payload": {
-        "nova_object.version": "1.0",
+        "nova_object.version": "1.1",
         "nova_object.namespace": "nova",
         "nova_object.name": "AggregatePayload",
         "nova_object.data": {
diff --git a/doc/notification_samples/aggregate-create-start.json b/doc/notification_samples/aggregate-create-start.json
index 9fc18d260..775feea7d 100644
--- a/doc/notification_samples/aggregate-create-start.json
+++ b/doc/notification_samples/aggregate-create-start.json
@@ -1,7 +1,7 @@
 {
     "priority": "INFO",
     "payload": {
-        "nova_object.version": "1.0",
+        "nova_object.version": "1.1",
         "nova_object.namespace": "nova",
         "nova_object.name": "AggregatePayload",
         "nova_object.data": {
@@ -9,6 +9,8 @@
             "metadata": {
                 "availability_zone": "nova"
             },
+            "hosts": null,
+            "id": null,
             "uuid": "788608ec-ebdc-45c5-bc7f-e5f24ab92c80"
         }
     },
diff --git a/doc/notification_samples/aggregate-delete-end.json b/doc/notification_samples/aggregate-delete-end.json
index 61dbaa1f7..058c3a9e5 100644
--- a/doc/notification_samples/aggregate-delete-end.json
+++ b/doc/notification_samples/aggregate-delete-end.json
@@ -1,7 +1,7 @@
 {
     "priority": "INFO",
     "payload": {
-        "nova_object.version": "1.0",
+        "nova_object.version": "1.1",
         "nova_object.namespace": "nova",
         "nova_object.name": "AggregatePayload",
         "nova_object.data": {
diff --git a/doc/notification_samples/aggregate-delete-start.json b/doc/notification_samples/aggregate-delete-start.json
index 8bd25fe43..b4c75abbe 100644
--- a/doc/notification_samples/aggregate-delete-start.json
+++ b/doc/notification_samples/aggregate-delete-start.json
@@ -1,7 +1,7 @@
 {
     "priority": "INFO",
     "payload": {
-        "nova_object.version": "1.0",
+        "nova_object.version": "1.1",
         "nova_object.namespace": "nova",
         "nova_object.name": "AggregatePayload",
         "nova_object.data": {
diff --git a/nova/notifications/objects/aggregate.py b/nova/notifications/objects/aggregate.py
index 677689827..88e617db5 100644
--- a/nova/notifications/objects/aggregate.py
+++ b/nova/notifications/objects/aggregate.py
@@ -25,9 +25,12 @@ class AggregatePayload(base.NotificationPayloadBase):
         'metadata': ('aggregate', 'metadata'),
     }
     # Version 1.0: Initial version
-    VERSION = '1.0'
+    #         1.1: Making the id field nullable
+    VERSION = '1.1'
     fields = {
-        'id': fields.IntegerField(),
+        # NOTE(gibi): id is nullable as aggregate.create.start is sent before
+        # the id is generated by the db
+        'id': fields.IntegerField(nullable=True),
         'uuid': fields.UUIDField(nullable=False),
         'name': fields.StringField(),
         'hosts': fields.ListOfStringsField(nullable=True),