taxonomy does not save??

I can’t get it to appear correctly in the meta box with all taxonomy names – but when saved it doesn’t appear in my database (custom fields) at all? It’s almost the same as in the demo. Why?

// TAXONOMY (woocommerce product attribute)
					array(
						'name'    => 'get attribute',
						'id'      => "{$prefix}sciname",
						'type'    => 'taxonomy',
						'options' => array (
							'taxonomy' => 'pa_scientific-name', // Taxonomy name
							'type'     => 'checkbox_list', // How to show taxonomy: 'checkbox_list' (default) or 'checkbox_tree', 'select_tree', select_advanced or 'select'. Optional
							'args'     => array(

							) // Additional arguments for get_terms() function. Optional
						),
					),

https://wordpress.org/plugins/meta-box/