diff --git a/nailgun/nailgun/orchestrator/deployment_serializers.py b/nailgun/nailgun/orchestrator/deployment_serializers.py
index b91c6aad9e..d69f12c53c 100644
--- a/nailgun/nailgun/orchestrator/deployment_serializers.py
+++ b/nailgun/nailgun/orchestrator/deployment_serializers.py
@@ -667,9 +667,14 @@ class DeploymentLCMSerializer(DeploymentHASerializer90):
             data = {}
             roles = []
             for role_data in node.replaced_deployment_info:
-                roles.append(role_data.pop('role'))
+                if 'role' in role_data:
+                    # if replaced_deployment_info consists
+                    # of old serialized info, the old info
+                    # have serialized data per role
+                    roles.append(role_data.pop('role'))
                 data = utils.dict_merge(data, role_data)
-            data['roles'] = roles
+            if roles:
+                data['roles'] = roles
             yield data
 
     def serialize_nodes(self, nodes):
diff --git a/nailgun/nailgun/test/integration/test_orchestrator_serializer_90.py b/nailgun/nailgun/test/integration/test_orchestrator_serializer_90.py
index a37e36aefa..98d21dfe7e 100644
--- a/nailgun/nailgun/test/integration/test_orchestrator_serializer_90.py
+++ b/nailgun/nailgun/test/integration/test_orchestrator_serializer_90.py
@@ -584,6 +584,22 @@ class TestDeploymentLCMSerialization90(
             self.assertIn('plugins', node)
             self.datadiff(plugins_data, node['plugins'], compare_sorted=True)
 
+    def test_serialize_with_customized(self):
+        objects.Cluster.prepare_for_deployment(self.cluster_db)
+        serialized = self.serializer.serialize(self.cluster_db, [self.node])
+
+        objects.Cluster.replace_deployment_info(self.cluster_db, serialized)
+        objects.Cluster.prepare_for_deployment(self.cluster_db)
+        cust_serialized = self.serializer.serialize(
+            self.cluster_db, [self.node])
+
+        for item in serialized:
+            if item['uid'] != consts.MASTER_NODE_UID:
+                self.assertIn(item, cust_serialized)
+            else:
+                item['cluster']['is_customized'] = True
+                self.assertIn(item, cust_serialized)
+
 
 class TestDeploymentHASerializer90(
     TestSerializer90Mixin,
@@ -602,6 +618,21 @@ class TestDeploymentHASerializer90(
         for ceph_key in expected_keys:
             self.assertIn(ceph_key, storage_attrs)
 
+    def test_serialize_with_customized(self):
+        cluster = self.env.clusters[0]
+        serializer = self.create_serializer(cluster)
+
+        objects.Cluster.prepare_for_deployment(cluster)
+        serialized = serializer.serialize(cluster, cluster.nodes)
+
+        objects.Cluster.replace_deployment_info(cluster, serialized)
+        objects.Cluster.prepare_for_deployment(cluster)
+        cust_serialized = serializer.serialize(
+            cluster, cluster.nodes)
+
+        for item in serialized:
+            self.assertIn(item, cust_serialized)
+
 
 class TestDeploymentTasksSerialization90(
     TestSerializer90Mixin,