diff --git a/lib/NGCP/Panel/Form/Device/Preference.pm b/lib/NGCP/Panel/Form/Device/Preference.pm
index fb8ab8483d..e5d80794d8 100644
--- a/lib/NGCP/Panel/Form/Device/Preference.pm
+++ b/lib/NGCP/Panel/Form/Device/Preference.pm
@@ -6,6 +6,7 @@ with 'NGCP::Panel::Render::RepeatableJs';
 
 use HTML::FormHandler::Widget::Block::Bootstrap;
 use NGCP::Panel::Utils::Preferences;
+use Storable qw();
 
 has '+widget_wrapper' => ( default => 'Bootstrap' );
 sub build_render_list {[qw/fields actions/]}
@@ -180,5 +181,42 @@ sub validate_enum_value {
         $field->add_error($err_msg);
     }
 }
+
+sub validate {
+    my ($self, $field) = @_;
+    my $c = $self->ctx;
+    return unless $c;
+    my $schema = $c->model('DB');
+
+    my $resource = Storable::dclone($self->values);
+    if ($resource->{dev_pref}) {
+        if ($resource->{reseller_id}) {
+            if ($resource->{autoprov_device_id}) {
+                my $err = "reseller_id and autoprov_device_id can't be specified together.";
+                $c->log->error($err);
+                $self->field('autoprov_device_id')->add_error($err);
+                $self->field('reseller_id')->add_error($err);
+            }   
+            if ($c->user->roles ne "reseller") {
+                unless($schema->resultset('resellers')->find($resource->{reseller_id})) {
+                    my $err = "Invalid reseller_id '$$resource{reseller_id}'";
+                    $c->log->error($err);
+                    $self->field('reseller_id')->add_error($err);
+                }
+            }
+        } elsif ($resource->{autoprov_device_id}) {
+            my $rs = $schema->resultset('autoprov_devices')->search({ 
+                id => $resource->{autoprov_device_id},
+                ($c->user->roles eq "reseller") ? (reseller_id => $c->user->reseller_id) : (),
+            });
+            unless ($rs->first) {
+                my $err = "Invalid reseller_id '$$resource{reseller_id}'";
+                $c->log->error($err);
+                $self->field('autoprov_device_id')->add_error($err);
+            }
+        }
+    }
+}
+
 1;
 # vim: set tabstop=4 expandtab:
diff --git a/lib/NGCP/Panel/Role/API/PreferencesMetaEntries.pm b/lib/NGCP/Panel/Role/API/PreferencesMetaEntries.pm
index 7d702df4af..fb5f48dff8 100644
--- a/lib/NGCP/Panel/Role/API/PreferencesMetaEntries.pm
+++ b/lib/NGCP/Panel/Role/API/PreferencesMetaEntries.pm
@@ -44,49 +44,22 @@ sub get_form {
     return NGCP::Panel::Form::get("NGCP::Panel::Form::Device::PreferenceAPI", $c);
 }
 
-sub check_resource{
-    my($self, $c, $item, $old_resource, $resource, $form) = @_;
-
-    my $schema = $c->model('DB');
-    if ($resource->{dev_pref}) {
-        if ($resource->{reseller_id}) {
-            if ($resource->{autoprov_device_id}) {
-                $c->log->error("reseller_id and autoprov_device_id can't be specified together.");
-                $self->error($c, HTTP_UNPROCESSABLE_ENTITY, "reseller_id and autoprov_device_id can't be specified together.");
-                return;
-            }   
-            if ($c->user->roles eq "reseller") {
-                $resource->{reseller_id} = $c->user->reseller_id;
-            } else {
-                unless($schema->resultset('resellers')->find($resource->{reseller_id})) {
-                    $c->log->error("Invalid reseller_id '$$resource{reseller_id}'");
-                    $self->error($c, HTTP_UNPROCESSABLE_ENTITY, "invalid reseller_id '$$resource{reseller_id}'");
-                    return;
-                }
-            }
-        } elsif ($resource->{autoprov_device_id}) {
-            my $rs = $schema->resultset('autoprov_devices')->search({ 
-                id => $resource->{autoprov_device_id},
-                ($c->user->roles eq "reseller") ? (reseller_id => $c->user->reseller_id) : (),
-            });
-            unless ($rs->first) {
-                $c->log->error("Invalid autoprov_device_id '$$resource{autoprov_device_id}'");
-                $self->error($c, HTTP_UNPROCESSABLE_ENTITY, "invalid autoprov_device_id '$$resource{autoprov_device_id}'");
-                return;
-            }
-        }
-    }
-    return 1;
-}
-
-sub process_form_resource{
-    my($self,$c, $item, $old_resource, $resource, $form, $process_extras) = @_;
-    if ($resource->{dev_pref} && !$resource->{reseller_id} && !$resource->{autoprov_device_id} ) {
+sub process_form_resource {
+    my ($self,$c, $item, $old_resource, $resource, $form, $process_extras) = @_;
+    if ( $resource->{dev_pref} && !$resource->{autoprov_device_id} ) {
         if ($c->user->roles eq "reseller") {
             $resource->{reseller_id} = $c->user->reseller_id;
         }    
     }
     return $resource;
 }
+
+sub resource_from_item {
+    my ($self, $c, $item) = @_;
+    my $resource = { $item->get_inflated_columns };
+    $resource->{enum} = [ map { my $e = {$_->get_inflated_columns}; delete $e->{preference_id}; $e; } $item->voip_preferences_enums->all ];
+    return $resource;
+}
+
 1;
 # vim: set tabstop=4 expandtab:
diff --git a/lib/NGCP/Panel/Utils/Preferences.pm b/lib/NGCP/Panel/Utils/Preferences.pm
index 7fcb207f13..b9afdc85c4 100644
--- a/lib/NGCP/Panel/Utils/Preferences.pm
+++ b/lib/NGCP/Panel/Utils/Preferences.pm
@@ -1337,23 +1337,19 @@ sub update_dynamic_preference {
     my @flags = grep {$_ =~/^[a-z]+_pref$/} keys %$resource;
     if(defined $enums and ref $enums eq 'ARRAY'){
         my $enums_rs = $preference->voip_preferences_enums;
-        my @old_enum_ids =  $enums_rs->get_column('id')->all;
-        my %old_enum_ids;
-        @old_enum_ids{@old_enum_ids} = @old_enum_ids;
+        $enums_rs->search_rs({
+            id => { -not_in => [ map { $_->{id} } @$enums ] }, 
+        })->delete;
         foreach my $enum (@$enums) {
             my $id = delete $enum->{id};
             my $enum_exists = $enums_rs->find($id);
             @{$enum}{@flags} = (1) x @flags;
             if ($enum_exists) {
                 $enum_exists->update($enum);
-                delete $old_enum_ids{$id};
             } else {
                 $preference->create_related('voip_preferences_enums', $enum);
             }
         }
-        $enums_rs->search_rs({
-            id => { -in => [ keys %old_enum_ids ] }, 
-        })->delete;
     } else {
         $preference->voip_preferences_enums->delete;
     }