How can I convert next-gen project to non-next gen/Classic?

[Brenna LaForest]

How can I convert next-gen project to non-next gen/Classic?  I created new project as next gen, but now I cannot use workflows or schemes, or sub-tasks...how can I convert back or do I need to delete and create a new one instead?

[Nic Brough -Adaptavist-]

I'm afraid you have to create a classic project and then use bulk-edit to move the issues into it from the next-gen project.

[Mick Might]

you can use subtasks in next gen jira now if this helps.