diff --git a/app/assets/javascripts/foreman_datacenter/ajax.js b/app/assets/javascripts/foreman_datacenter/ajax.js
index 4ebf30d..f5e61be 100644
--- a/app/assets/javascripts/foreman_datacenter/ajax.js
+++ b/app/assets/javascripts/foreman_datacenter/ajax.js
@@ -1,6 +1,6 @@
 $(function () {
   function onSend() {
-    foreman.tools.showSpinner();
+    tfm.tools.showSpinner();
   }
 
   function onSuccess() {
@@ -8,7 +8,7 @@ $(function () {
   }
 
   function onComplete() {
-    foreman.tools.hideSpinner();
+    tfm.tools.hideSpinner();
   }
 
   var selectors = 'a[data-action="connected"], a[data-action="planned"], a[data-action="destroy"]';
diff --git a/app/assets/javascripts/foreman_datacenter/device_interface_connections.js b/app/assets/javascripts/foreman_datacenter/device_interface_connections.js
index 2cf039f..9428329 100644
--- a/app/assets/javascripts/foreman_datacenter/device_interface_connections.js
+++ b/app/assets/javascripts/foreman_datacenter/device_interface_connections.js
@@ -4,13 +4,13 @@ function connectionsNewRackSelected(item) {
   if (rack === '') {
     return false;
   } else {
-    foreman.tools.showSpinner();
+    tfm.tools.showSpinner();
     var url = $item.data('url');
     var params = $.param({ rack_id: rack });
     var $container = $('#devices-container');
     $container.load(url, params, function () {
       $container.find('select').select2({allowClear: true});
-      foreman.tools.hideSpinner();
+      tfm.tools.hideSpinner();
     });
   }
 }
diff --git a/app/assets/javascripts/foreman_datacenter/devices.js b/app/assets/javascripts/foreman_datacenter/devices.js
index bc115fc..23ee102 100644
--- a/app/assets/javascripts/foreman_datacenter/devices.js
+++ b/app/assets/javascripts/foreman_datacenter/devices.js
@@ -4,13 +4,13 @@ function devicesNewManufacturerSelected(item) {
   if (manufacturer === '') {
     return false;
   } else {
-    foreman.tools.showSpinner();
+    tfm.tools.showSpinner();
     var url = $item.data('url');
     var params = $.param({ manufacturer_id: manufacturer });
     var $container = $('#device-types-container');
     $container.load(url + ' #device-types', params, function () {
       $container.find('select').select2({allowClear: true});
-      foreman.tools.hideSpinner();
+      tfm.tools.hideSpinner();
     });
   }
 }
@@ -21,13 +21,13 @@ function devicesNewSiteSelected(item) {
   if (site === '') {
     return false;
   } else {
-    foreman.tools.showSpinner();
+    tfm.tools.showSpinner();
     var url = $item.data('url');
     var params = $.param({ site_id: site });
     var $container = $('#sites-container');
     $container.load(url + ' #sites', params, function () {
       $container.find('select').select2({allowClear: true});
-      foreman.tools.hideSpinner();
+      tfm.tools.hideSpinner();
     });
   }
 }
diff --git a/app/assets/javascripts/foreman_datacenter/racks.js b/app/assets/javascripts/foreman_datacenter/racks.js
index 44f87cc..26a9105 100644
--- a/app/assets/javascripts/foreman_datacenter/racks.js
+++ b/app/assets/javascripts/foreman_datacenter/racks.js
@@ -4,13 +4,13 @@ function racksNewSiteSelected(item) {
   if (site === '') {
     return false;
   } else {
-    foreman.tools.showSpinner();
+    tfm.tools.showSpinner();
     var url = $item.data('url');
     var params = $.param({ site_id: site });
     var $container = $('#rack-groups-container');
     $container.load(url + ' #rack-groups', params, function () {
       $container.find('select').select2({allowClear: true});
-      foreman.tools.hideSpinner();
+      tfm.tools.hideSpinner();
     });
   }
 }
diff --git a/app/assets/javascripts/foreman_datacenter/shared.js b/app/assets/javascripts/foreman_datacenter/shared.js
index cb2225c..5e613c2 100644
--- a/app/assets/javascripts/foreman_datacenter/shared.js
+++ b/app/assets/javascripts/foreman_datacenter/shared.js
@@ -10,10 +10,10 @@ function newDeviceSelected(item) {
     if (fragment) url += ' ' + fragment;
     var params = $.param({device_id: id});
     var $targetContainer = $($mainContainer.data('target'));
-    foreman.tools.showSpinner();
+    tfm.tools.showSpinner();
     $targetContainer.load(url, params, function () {
       $targetContainer.find('select').select2({allowClear: true});
-      foreman.tools.hideSpinner();
+      tfm.tools.hideSpinner();
     });
   }
 }
diff --git a/app/models/concerns/foreman_datacenter/host_extensions.rb b/app/models/concerns/foreman_datacenter/host_extensions.rb
index 766b73a..d80e53d 100644
--- a/app/models/concerns/foreman_datacenter/host_extensions.rb
+++ b/app/models/concerns/foreman_datacenter/host_extensions.rb
@@ -9,9 +9,11 @@ module HostExtensions
     end
 
     def update_device_on_destroy
-      new_device_name = "Unassigned device (former: #{name})"
-      device.update(name: new_device_name)
-      device.interfaces.clear
+      if device.exist? 
+        new_device_name = "Unassigned device (former: #{name})"
+        device.update(name: new_device_name)
+        # device.interfaces.clear
+      end
     end
 
     def fact_value_by_name(name)
diff --git a/lib/foreman_datacenter/version.rb b/lib/foreman_datacenter/version.rb
index 5601650..4558f51 100644
--- a/lib/foreman_datacenter/version.rb
+++ b/lib/foreman_datacenter/version.rb
@@ -1,3 +1,3 @@
 module ForemanDatacenter
-  VERSION = '0.1.9'.freeze
+  VERSION = '0.1.10'.freeze
 end