Custom field not updated via rest api

Currently I make custom field in woocommerce, I able to do all thing but I facing one issue —

Issue is : https://woocommerce.arcsdev.com/wp-json/wc/v2/products?consumer_key=xxxx

I am not able to update custom field through rest api. Like I create vendor custom field but that I manually update and it’s show on json reponse in meta data, but not able to update through rest api,

Please sugget me.

The page I need help with: [log in to see the link]