text_row(_("GSTNo:"), 'tax_id', null, 40, 40);
- if (!$selected_id || is_new_customer($selected_id))
+ if (!$selected_id || is_new_customer($selected_id) || (!key_in_foreign_table($selected_id, 'debtor_trans', 'debtor_no') &&
+ !key_in_foreign_table($selected_id, 'sales_orders', 'debtor_no')))
{
currencies_list_row(_("Customer's Currency:"), 'curr_code', $_POST['curr_code']);
}