Hi Devendra,
We do have few issues that could have caused this. It is usually not a true duplicate in the database for team records, but duplicate on other items that makes the display show this way.
Try running Update Cost Totals job and see if that helps.
Try creating a new current Baseline and see if it works.
If nothing does, raise a case with us at CA Support and we will determine the exact root cause of the display duplicate issues.
Thanks -Nika