Make sure to treat the namespace Name as the ID

ui/app/models/namespace.js

+import Ember from 'ember';
 import Model from 'ember-data/model';
 import attr from 'ember-data/attr';
 
+const { computed } = Ember;
+
 export default Model.extend({
-  name: attr('string'),
+  name: computed.readOnly('id'),
   hash: attr('string'),
   description: attr('string'),
 });

ui/app/serializers/namespace.js

+import ApplicationSerializer from './application';
+
+export default ApplicationSerializer.extend({
+  primaryKey: 'Name',
+});