It’s really hard to understand what are you actually doing ( a refactor will help also).
but for updating you can try:
You will need the $id
, show you tell which row to update.
$wpdb->update(
$wpdb->prefix . 'tropix_dmin',
array( 'post_name1' => $arr),
array( 'id' => $id ),
array( '%s' ),
array( '%d' )
);
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