diff --git a/lib/NGCP/Panel/Controller/API/SoundSets.pm b/lib/NGCP/Panel/Controller/API/SoundSets.pm
index 21a6a78129..66b7ff05a4 100644
--- a/lib/NGCP/Panel/Controller/API/SoundSets.pm
+++ b/lib/NGCP/Panel/Controller/API/SoundSets.pm
@@ -126,8 +126,8 @@ sub POST :Allow {
             media_type => 'application/json',
         );
         last unless $resource;
-
-        $resource->{contract_id} = delete $resource->{customer_id};
+        my $customer_id = delete $resource->{customer_id};
+        $resource->{contract_id} //= $customer_id;
         my $form = $self->get_form($c);
         last unless $self->validate_form(
             c => $c,
diff --git a/lib/NGCP/Panel/Role/API/SoundSets.pm b/lib/NGCP/Panel/Role/API/SoundSets.pm
index 39f80af067..10feb2679d 100644
--- a/lib/NGCP/Panel/Role/API/SoundSets.pm
+++ b/lib/NGCP/Panel/Role/API/SoundSets.pm
@@ -100,7 +100,8 @@ sub item_by_id {
 sub update_item {
     my ($self, $c, $item, $old_resource, $resource, $form) = @_;
 
-    $resource->{contract_id} = delete $resource->{customer_id};
+    my $customer_id = delete $resource->{customer_id};
+    $resource->{contract_id} //= $customer_id;
     $form //= $self->get_form($c);
     return unless $self->validate_form(
         c => $c,