You are referring to software repositories?
If so, there are no 6.1 repositories. Mageia 6.1 is just a snapshot of Mageia 6 including all updates. Quoting the download page:
Live Media and Network Installation Media have been updated to support new hardware. They are called Mageia 6.1 release to distinguish them from the original Mageia 6 release. Use these if the original Mageia 6 iso images are unable to boot on your hardware, or if you would like more up-to-date software while running in live mode. Please take a look in the documentation for the appropriate media.There's no need to reinstall if you have Mageia 6 installed and already have the latest updates installed.