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Quick explanation : When I add a new "Company" (custom post type), I have a drop down menu listing all the companies to choose if the one i'm creating depends from another one. I got 3 metaboxes, the dropdown is in the first one.

In functions.php :
<select value="<?php echo $subsidiary; ?>" name="subsidiary">
<?php
$args = array( 'post_type' => 'company');
$loop = new WP_Query( $args );
while ( $loop->have_posts() ) : $loop->the_post();
?>
<option value="<?php echo the_ID(); ?>" ><?php the_title() ?></option>
<?php
endwhile;
?>
</select>

The dropdown is listing all the companies as i want, but when i create a new company, all fields located after my dropdown take the values from the first company in my list, and i can't change them. Any clues?

Thanks in advance.

1

When you're calling $loop->the_post(), you're replacing the global $post instance. You need to call wp_reset_postdata() after your while loop.

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