Comment 10 for bug 938862

@JDEvora - that looks like a separate issue from the one this bug is about.
I believe you can solve your problem by removing the sync metadata - the easiest way to do this is remove and reinstall ubuntu one as described here:

https://one.ubuntu.com/help/faq/how-do-i-completely-remove-and-reinstall-ubuntu-one-309/

If you still have problems, I suggest contacting support here: https://one.ubuntu.com/help/contact/
They can help you with known problems, and may end up creating a new bug if they decide it is necessary.

Thanks!