If I convert subtasks to task issue types, will I lose any data from the original subtask?

[LaTanya Limbrick]

Please advise how I can convert subtasks to task issue types without losing any data.

[Nic Brough -Adaptavist-]

You will always lose "what the parent was", because issues don't have a parent, but all the other fields will be kept (even if they're not on screen), as long as they have "context" for both issue types.  

If for example, you set up a field called "wavelength" that only exists on "technical tasks", and another called "frequency" that is global, then fill them both in on a technical task, then move it to an issue, it will lose the value for wavelength.

You can check the field contexts from Admin -> Custom fields -> each field will list what project/issue-type it belongs to.

Also, it's not totally lost - all the old data (including parent) will show in the history of the issue.