Change word in woocommerce product category custom field

I have woocommerce shop with a large number of categories that have a filled custom field custom_title. Each custom field has the word Category and I want to replace it with the word Product category. I want make it throught SQL in PHPmyadmin, but i dont know how.

I found that this custom field is in table wp_termmeta and this custom field meta_key = custom_title.