After reading other comments about how importing data into a newer version of Jira that was exported under an older version is not an option, I'm curious as to how people are handling this challenge? I have a situation where this simply has to occur, and the only way I could see resolving it is to install a whole separate Jira server at 3.13.4, importing my project, upgrading that instance to 4.3.4, then exporting the data back out to be imported into the production server where I need it. Is that really the only solution? I'm surprised that there isn't at least a data migration tool to help with this or some other less complex method.
Appreciate some insight...
Carl