If you copy a test, then the new copy of the test will have a different Test ID than the original did. That is unavoidable.
Why do you need to make a copy of the test? Are you changing the test before you run it? If not, then there should be no need to make a copy.
Why do you need to make a copy of the test? Are you changing the test before you run it? If not, then there should be no need to make a copy.