do_action( 'woocommerce_updated_instance_ids' )
Shipping zones in WC 2.6.0 use a table named woocommerce_shipping_zone_methods.
Description Description
Migrate the old data out of woocommerce_shipping_zone_shipping_methods into the new table and port over any known options (used by table rates and flat rate boxes).
Source Source
File: includes/wc-update-functions.php