my $error =
$self->ut_numbern('svcnum')
- || $self->ut_foreign_key('providernum', 'cable_provider', 'providernum')
+ || $self->ut_foreign_keyn('providernum', 'cable_provider', 'providernum')
|| $self->ut_alphan('ordernum')
|| $self->ut_foreign_key('modelnum', 'cable_model', 'modelnum')
|| $self->ut_alpha('serialnum')