update

src/components/EditStaffForm/EditStaffForm.tsx

@@ -54,7 +54,7 @@ const EditStaffForm: React.FC<formProps> = ({ Title, fieldLists }) => {
           const temp = {
               id: parseInt(idString),
               ...data,
-              emergContactPhone: data.emergContactPhone.toString(),
+              emergContactPhone: data.emergContactPhone ? data.emergContactPhone.toString() : "",
               phone1: data.phone1.toString(),
               phone2: data.phone1.toString(),
               joinDate: formatJoinDate,