No, this means you have to wait a couple of days for dependencies to get fixed. This can happen every now and then since you are on Sid. Sid is far from unstable but every now and then some package can be broken.
Changing your repo's from unstable to testing is not always a quick fix, patience is normally better. Remember you are not on testing now. Debian can't just be 'downgraded' by using the testing repo's. You are still on Sid but apt-get dist-upgrade won't do anything for quite some time