I choose to save a specific form with current process data. However a field submitted in the last user task is not available to save to the repository.

The field is a file upload field called Signed Letter. It is uploaded before the Save To Repository task, but it does not show as an item we can save.

I have the field on a form

And I have the form assigned to the user task, before the save to repository task, so the field is a current field.

But its not listed as a variable in the save to repository task