content_to_description.php

<?php
$the_query = new WP_Query( array(
    'post_type' => 'items',
    'tax_query' => array(
        array (
            'taxonomy' => 'washu_ppi_items_types',
            'field' => 'slug',
            'terms' => 'apartments',
        )
    ),
	'posts_per_page' => -1
) );

$apartment_ids = array();

while ( $the_query->have_posts() ) :
    $the_query->the_post();
    // Show Posts ...
	$a = apply_filters( 'the_content', get_the_content() );
	$b = update_field( 'washu_ppi_summary', $a );
	if ( true == $b ) {
		echo get_the_ID() . ' update succesfully';
	} else {
		echo get_the_ID() . ' ERROR!';
	}
	
endwhile;

/* Restore original Post Data 
 * NB: Because we are using new WP_Query we aren't stomping on the 
 * original $wp_query and it does not need to be reset.
*/
wp_reset_postdata();