I have an Excel spreadsheet listing my projects. I want to import them all into Jira as new epics but under an existing project.
I have created a csv file where I have listed all mandatory and optional fields which are listed on a Epic creation screen.
I'm facing two challenges.
1—At step 2 (set up a project), Jira isn't letting me select an existing project but forcing me to create a new one. I want to import an existing one.
2- At step 3 (map fields): Not all my custom fields are listed in the drop-down. e.g. 'Application' is one of the custom fields which is mandatory while I create a new epic. I put this in the csv as a column as well, but I'm unable to map it as its not appearing in the list.
Please help resolve both of my challenges.

