Versioning on Onedrive

Hi everybody,

I would like to use SyncBack to backup my documents to Onedrive. Specifically, I set SyncBack to create a backup whenever there are changes in a folder containing 59 files and to keep unlimited versions of my files. Now I changed a file and SyncBack created not only a version of this one file, but of 27 files from the same folder, even though only the one file was modified. Does anybody know what is going on here and how I can circumvent this problem?

Best regards,
Stefan.