I've watched a previous youtube video on how to make your artwork bigger and it made me paste the code below into console. which did work and do its job but now whenever i try to delete the artwork, it wouldnt let me and if i try to change the visibility setting it'd show me a message that reads
"Unable to change visibility
There was a problem changing the visibility of this item (15). Please try again later"

The code i used:
$J('#image_width').val(1000).attr('id',''),$J('#image_height').val(1).attr('id','');