Meta Box

Ok, i think I've found the issue. It wasn't the data migration that was the problem. That just made me notice it.

It was the Columns inside the fields. I'd perhaps tried too much at once.
When I commented out the 'columns' key for each field it worked as expected.

$meta_boxes[] = array(
		'title' => 'Pedigree',
		'pages' => array( 'drivers' ),
		'context' => 'normal',
		'priority' => 'low',
		'fields' => array(
			array(
		    	'id' => 'pedigree_group',
		    	'type' => 'group',
		        'name' => 'Group',
		        'clone' => true,
		        'fields' => array(
		        	array(
		                'name' => 'Year',
		                'id' => 'year',
		                'type' => 'text',
		                'columns' => 2,
		            ),
		            array(
		                'name' => 'Title',
		                'id' => 'title',
		                'type' => 'text',
		                'columns' => 10,
		            ),
		            array(
		                'name' => 'Wins',
		                'id' => 'wins',
		                'type' => 'text',
		                'columns' => 4,
		            ),
		            array(
		                'name' => 'Podiums',
		                'id' => 'podiums',
		                'type' => 'text',
		                'columns' => 4,
		            ),
		            array(
		                'name' => 'Poles',
		                'id' => 'poles',
		                'type' => 'text',
		                'columns' => 4,
		            ),
		            array(
		                'name' => 'Description',
		                'id' => 'description',
		                'type' => 'textarea',
		                'columns' => 8,
		            ),
		        ),
		    ),
		)
	);

So sorted for now but columns inside a group would be really useful for making this really slick.

Great job either way though!

Thanks

I essentially wrote it out again from scratch.

Plucked out the data I wanted from the previous fields. Remapped it onto a new array and saved that with the same key.

As far as I can tell everything was in the right format.