Hm, my post must be invisible.

The messages are due to older versions of files left over in Backup Menu. It is a known and old issue and does not affect anything. Fixed since, assumingly in BM.

Original question

Answer.

Answer is Feb 1st, issue is since old. The post that spells it out that it's no issue and it's an old reference has since been edited to merge multiple answers and is thus lost. Google Cache seems to remember it but I can't link it because it will become dead soon.

So, you know, relax, the files and not needed.