I can't figure out how to copy a formula we use for a reference number into a different custom field. When I copy and update the custom names it tells me that "Packaging Request Type is not a valid field in your system".  I'm not sure what that means? It's a custom field we have been using and looks...

@KatherineLa  The reference number changes multiple times. After I submit, the request creates the 1st one, then I go to "Covert to project from template" and that shows a different reference number. Then I hit "Convert" and the now project shows another new reference number.

We noticed that the reference number assigned to an issue is now changing once converted to a project. Anyone else have this problem?