@Mehdi Moussa,
Thanks for your great suggestions at first.
Actually, we do not want our clients to modify the default fields of WP ERP.
According to our description, the vision of custom filed builder is to add extra fields not to delete an existing field or change the position of it.
But we really appreciate your thoughts and have noted these in the feature list for future. Will try to bring one by one in future (if our team members agree with these)
Cheers 🙂
