[Leonardo Guizzetti]

Thanks for your responses and help. However, the data is not allowed to share to the public.
I really want to get things done. That is the fact.

That’s perfectly understandable, which is why we don’t ask for real data, just realistic data that reproduces the nature of the potential problems. I’m happy you found a way to circumvent your issue, but you should realize that it is entirely bespoke to a particular dataset and doesn’t deal with the actual issue at hand, nor is it generalizable. Nevertheless, I’m certain that you have received enough help here to properly deal with trailing whitespace so you can revisit the thread when you encounter the issue again.