R11 How to remove Default Expense Account from Person Information Form

Hello Oracle,

Thanks in advanced for your collaboration. Our client (EBS R11) has required to remove/delete the Default Expense Account from Person information Form. We removed it but when pressing Save Button the action does not take place. We believe this is not the correct place for removing the Default Expense Account for this Employee. we would like your collaboration to clarify where we should remove this account for this person?

Thanks in advanced for your collaboration