Hi Gafoor,
I seem to understand that you want to reassign the serial numbers if any object is deleted.
If the data is large say 500 objects and you delete an object at 100th place then you have to iterate over all the 400 objects after that and reassign the serial number, which will make the delete process slow
If the serial numbers are only used to display order in a datagrid or list view then I will suggest to use custom CSS to display serial numbers.
Dear Gafoor,
Try to use this module Mendix Marketplace - Drag and Drop.