Sergey Biryukov

Adds parent comment ID meta box to a comment editing page. Use to make existing comments threaded.

Edit Parent Comment ID

Instead, I advise you to use this plugin Change Comment Parent



New alternative to this plug-in

Adds parent comment ID meta box to a comment editing page.

KLicheR

Create a unique ID to easily identify repeater field’s rows. The field is fulfill on the first “save” of the post.
Compatibility
This ACF field type is compatible with:
<ul>
<li>ACF 5</li>
</ul>

Advanced Custom Fields: Unique ID Field

Create a unique ID to easily identify repeater field's rows.

Edit Parent Comment ID vs Advanced Custom Fields: Unique ID Field