plugin setting does not save

Hi,

1. In my staging website. I turned on the setting for:

“Add GTIN, MPN, UPC, EAN, Product condition, Optimised title, Installment, Unit measure and Brand attributes to your store: (Read more about this)”

2. I went to the extra fields tab and turned off everything except brand
3. Edited a single product page and entered a brand name for it.
4. My theme’s brand name filter menu did not work the way I expected. So I installed woocommerce brand plugin and decided to turn off the setting “Add GTIN, MPN, UPC, EAN, Product condition, Optimised title, Installment, Unit measure and Brand attributes to your store: (Read more about this)”

After I turn off this setting and refresh the page or go to another menu and come back to this. The setting does not save and it is still on.