When you need to create a new issue and you already have a baseline issue, JIRA allows you to quickly create it with the data based on your existing issues, by cloning the original one. Cloning an issue allows you to quickly create a new one with most of its field populated.
A cloned issue has the same values as the original issue for its fields such as description, issue type, and priority; it is a separate entity nonetheless. Further actions performed on either of the two issues will not affect the other.
When an issue is being cloned, a Clone link is automatically created between the two issues, establishing a relationship.
Cloning an issue in JIRA is simple and straightforward. All you have to do is specify a new summary for the cloned issue:
Once the issue is successfully cloned, you will be taken to the issue summary page for the newly cloned issue.