Bench migrate doesn't apply custom field

I added a custom field in Custom field List doctype then added it in the hooks then run bench --site <site-name> export fixtures … then run bench --site <site-name> migrate but after looking in the custom field list the field didn’t change i tried to delete the old field then run again migrate but it just create the old field … is there another way to add custom field aside putting it in hooks ?

It turns out that in Erpnext folder there is a custom folder where the old dev put the json files