Magento - Set product attribute to use default values

Question

This has been asked many times before but with no working answer.

I have multiple stores and some attributes have been overridden. I want to change these attributes

Answer 1

This doesn't work because you need the current store being the admin store for this kind of operation.

To make a specific store view use the default value for a given attribute:

Mage::app()->setCurrentStore(Mage_Core_Model_App::ADMIN_STORE_ID);

$product = Mage::getModel('catalog/product')
    ->load($product_id)         // in your case: 1
    ->setStoreId($store_id)     // in your case: 3
    ->setData($attr, false)     // in your case: 'name'
    ->save();