System generated duplicate fields not letting customize doctypes


I can’t do any customization due system generated duplicate fields like this

Which doctype is this? If it is a core doctype, then customizing the core doctype is not allowed.
What customization do you want to do?

It is not.it is sales order

Try updating your app because there is only one field in Sales Order names called column_break_28. What errors is it giving while performing customizations?

So I should update my app?

yes, try updating your app