diff --git a/lib/NGCP/Panel/Controller/API/ContractsItem.pm b/lib/NGCP/Panel/Controller/API/ContractsItem.pm
index 4317560b92..547022d6e2 100644
--- a/lib/NGCP/Panel/Controller/API/ContractsItem.pm
+++ b/lib/NGCP/Panel/Controller/API/ContractsItem.pm
@@ -31,7 +31,7 @@ __PACKAGE__->config(
             Does => [qw(ACL RequireSSL)],
             Method => $_,
             Path => __PACKAGE__->dispatch_path,
-        } } @{ __PACKAGE__->allowed_methods }
+        } } @{ __PACKAGE__->allowed_methods },
     },
     action_roles => [qw(HTTPMethods)],
 );
@@ -41,6 +41,7 @@ sub auto :Private {
 
     $self->set_body($c);
     $self->log_request($c);
+    return 1;
 }
 
 sub GET :Allow {
@@ -54,9 +55,8 @@ sub GET :Allow {
 
         my $response = HTTP::Response->new(HTTP_OK, undef, HTTP::Headers->new(
             (map { # XXX Data::HAL must be able to generate links with multiple relations
-                s|rel="(http://purl.org/sipwise/ngcp-api/#rel-resellers)"|rel="item $1"|;
-                s/rel=self/rel="item self"/;
-                $_
+                s|rel="(http://purl.org/sipwise/ngcp-api/#rel-resellers)"|rel="item $1"|r =~
+                s/rel=self/rel="item self"/r;
             } $hal->http_headers),
         ), $hal->as_json);
         $c->response->headers($response->headers);
@@ -104,6 +104,7 @@ sub PATCH :Allow {
         my $old_resource = { $contract->get_inflated_columns };
         my $billing_mapping = $contract->billing_mappings->find($contract->get_column('bmid'));
         $old_resource->{billing_profile_id} = $billing_mapping->billing_profile_id;
+        $old_resource->{type} = $billing_mapping->product->class;
         my $resource = $self->apply_patch($c, $old_resource, $json);
         last unless $resource;
 
@@ -146,6 +147,8 @@ sub PUT :Allow {
         );
         last unless $resource;
         my $old_resource = { $contract->get_inflated_columns };
+        my $billing_mapping = $contract->billing_mappings->find($contract->get_column('bmid'));
+        $old_resource->{type} = $billing_mapping->product->class;
 
         my $form = $self->get_form($c);
         $contract = $self->update_contract($c, $contract, $old_resource, $resource, $form);
@@ -171,6 +174,7 @@ sub PUT :Allow {
 }
 
 =pod
+
 # we don't allow to delete contracts
 sub DELETE :Allow {
     my ($self, $c, $id) = @_;
@@ -196,12 +200,14 @@ sub DELETE :Allow {
     }
     return;
 }
+
 =cut
 
 sub end : Private {
     my ($self, $c) = @_;
 
     $self->log_response($c);
+    return;
 }
 
 # vim: set tabstop=4 expandtab:
diff --git a/lib/NGCP/Panel/Role/API/Contracts.pm b/lib/NGCP/Panel/Role/API/Contracts.pm
index e40cf3014c..7cc2e7c6d1 100644
--- a/lib/NGCP/Panel/Role/API/Contracts.pm
+++ b/lib/NGCP/Panel/Role/API/Contracts.pm
@@ -119,7 +119,7 @@ sub update_contract {
         $self->error($c, HTTP_UNPROCESSABLE_ENTITY, "Invalid 'billing_profile_id', not defined");
         return;
     }
-   
+
     $form //= $self->get_form($c);
     # TODO: for some reason, formhandler lets missing contact_id slip thru
     $resource->{contact_id} //= undef; 
@@ -128,6 +128,7 @@ sub update_contract {
         form => $form,
         resource => $resource,
     );
+    delete $resource->{type};
 
     my $now = NGCP::Panel::Utils::DateTime::current_local;
     $resource->{modify_timestamp} = $now;
diff --git a/t/api-contracts.t b/t/api-contracts.t
index 0e0e602b5c..375fba0656 100644
--- a/t/api-contracts.t
+++ b/t/api-contracts.t
@@ -108,7 +108,7 @@ my @allcontracts = ();
     is($res->code, 422, "create contract with invalid type");
     my $err = JSON::from_json($res->decoded_content);
     is($err->{code}, "422", "check error code in body");
-    ok($err->{message} =~ /Invalid 'type'/, "check error message in body");
+    like($err->{message}, qr/Validation failed.*type/, "check error message in body");
 
     # try to create invalid contract with wrong billing profile
     $req->content(JSON::to_json({