Updating custom fields in creator

Updating custom fields in creator

I'm trying to update a sales order with the id of the component that is linked to it in our creator app when a new item is saved. However, the custom field that I made for the id isn't being filled in.  Does anyone have any thoughts as to what I'm doing wrong?

  2.         updateSo = Map();
  3. updateSo.put("Print_Booking_ID",input.ID);
  4. res =  zoho.crm.updateRecord("Sales_Orders",soNr,updateSo);