I am sorry that we cannot tell you much, but there is no context for your question.
I guess that the prior comments might help our understanding, but you have asked a question that does not have any of that history. We don't know what "prior comments" you are asking about.
The best I can do is suggest that you click on "change parent" in the context menu, or "move issue" selecting the new parent there.
Look to the three dots to the upper-right of the issue view - there is a "move" option in there that takes you to a screen with "change project" and "change parent" options.
Note that the "change parent" will only appear if the issue is a sub-task, it's not for changing the Epic links.
When to use CSV importer When managing your processes in Jira, there are many occasions where you need to create a lot of tasks. Creating them one by one will cost you a lot of time and effort and i...
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