Which of the following is NOT cloned when duplicating an issue?

When duplicating an issue in Jira, the comments associated with the original issue are not cloned to the new issue. This design choice is purposeful; comments often contain context-specific discussions or information related to the original issue, and transferring them could lead to confusion or misinterpretation in the context of the new issue.

In contrast, other elements such as the assignee, labels, and subtasks can be cloned when an issue is duplicated. The assignee may be set again if not specified otherwise, allowing for continuity in ownership of the work. Labels help in categorizing issues for better management and searching, and subtasks can be replicated to maintain the structure of the work breakdown.

By excluding comments from the duplication process, Jira maintains clarity and ensures that each issue remains unique and relevant to its context, thus promoting better issue management and tracking within projects.