Version 5.0.0 beta 6

applications/blog/sources/Category/Category.php

@@ -162,7 +162,12 @@ class Category extends Model
 
 		$class = get_called_class();
 
-		$form->add( new Node( 'category_parent', $this->id ? $this->parent : 0, TRUE, array( 'class' => 'IPS\blog\Category', 'subnodes' => FALSE, 'zeroVal' => 'no_parent', 'permissionCheck' => function( $node ) use ( $class )
+		$form->add( new Node( 'category_parent', $this->id ? $this->parent : 0, TRUE, [
+											   'class' => Category::class,
+											   'subnodes' => FALSE,
+											   'zeroVal' => 'no_parent',
+											   'disableCopy' 		=> true,
+											   'permissionCheck' => function( $node ) use ( $class )
 		{
 			if( isset( $class::$subnodeClass ) AND $class::$subnodeClass AND $node instanceof $class::$subnodeClass )
 			{
@@ -170,7 +175,9 @@ class Category extends Model
 			}
 
 			return !isset( Request::i()->id ) or ( $node->id != Request::i()->id and !$node->isChildOf( $node::load( Request::i()->id ) ) );
-		} ) ) );
+		}
+		]
+					) );
 
         parent::form( $form );
 	}