A "draft version" is an early or preliminary version of something, such as a document, song, or plan. It's not the final version, but something that is still being worked on and can be changed or improved later. Full definition
This wording didn't appear in draft versions of the agreement. (newscientist.com)
The book then that I sell are actually a final edition, with added content and chapters that are not available in the free first draft version. (goodereader.com)
It is partly based on draft versions of the report's many chapters, the final text of which will be released within the next two days. (newscientist.com)