do not add meta stations if eva is undef

				@results = map { $_->[0] }

				  sort { $b->[1] <=> $a->[1] }

				  map { [ $_, $_->datetime->epoch ] } $status->results;

				if ( $status->station->{eva} ) {

					$self->stations->add_meta(

						eva   => $status->station->{eva},

						meta  => $status->station->{evas} // [],

						hafas => $hafas_service,

					);

				}

				$status = {

					station_eva  => $status->station->{eva},

					station_name => (