Version 5.0.0 beta 3

system/Theme/Editor/Category.php

@@ -318,7 +318,7 @@ class Category extends Model
 	{
 		$form->add( new Translatable( 'themeeditor_cat_name', null, true, array(
 			'app' => 'core',
-			'key' => ( $this->id ? 'themeeditor_cat_' . $this->id : null )
+			'key' => ( $this->id ? 'themeeditor_cat_' . $this->key : null )
 		) ) );
 
 		$form->add( new Text( 'themeeditor_cat_key', $this->key, true, array(