diff --git a/nova/objects/aggregate.py b/nova/objects/aggregate.py
index 50b8dbd64..6e75a20dd 100644
--- a/nova/objects/aggregate.py
+++ b/nova/objects/aggregate.py
@@ -58,6 +58,9 @@ class Aggregate(base.NovaPersistentObject, base.NovaObject):
 
     @base.remotable
     def create(self, context):
+        if self.obj_attr_is_set('id'):
+            raise exception.ObjectActionError(action='create',
+                                              reason='already created')
         self._assert_no_hosts('create')
         updates = self.obj_get_changes()
         payload = dict(updates)
@@ -68,6 +71,7 @@ class Aggregate(base.NovaPersistentObject, base.NovaObject):
                                                     "create.start",
                                                     payload)
         metadata = updates.pop('metadata', None)
+        updates.pop('id', None)
         db_aggregate = db.aggregate_create(context, updates, metadata=metadata)
         self._from_db_object(context, self, db_aggregate)
         payload['aggregate_id'] = self.id
diff --git a/nova/tests/objects/test_aggregate.py b/nova/tests/objects/test_aggregate.py
index 7b2c0157a..c27fadb84 100644
--- a/nova/tests/objects/test_aggregate.py
+++ b/nova/tests/objects/test_aggregate.py
@@ -53,6 +53,18 @@ class _TestAggregateObject(object):
         agg.create(self.context)
         self.compare_obj(agg, fake_aggregate, subs=SUBS)
 
+    def test_recreate_fails(self):
+        self.mox.StubOutWithMock(db, 'aggregate_create')
+        db.aggregate_create(self.context, {'name': 'foo'},
+                            metadata={'one': 'two'}).AndReturn(fake_aggregate)
+        self.mox.ReplayAll()
+        agg = aggregate.Aggregate()
+        agg.name = 'foo'
+        agg.metadata = {'one': 'two'}
+        agg.create(self.context)
+        self.assertRaises(exception.ObjectActionError, agg.create,
+                          self.context)
+
     def test_save(self):
         self.mox.StubOutWithMock(db, 'aggregate_update')
         db.aggregate_update(self.context, 123, {'name': 'baz'}).AndReturn(