Cloning an existing test cycle copies all the tests cases based on the criteria you provide. It clears all test results, comments, attachments, and defects. This is a great way to quickly create a new test cycle based on a test cycle that already exists.
Select a test cycle (or multiples) you want to clone.
The Clone Test Cycle screen appears.
Make changes to the field criteria as you desire.
The new test cycle (or cycles) appear in the Cycles view with "(cloned)" in the title.