My question is similar to this question but in my case I am wondering can two of the SAME version of TFS (2013) share a data layer. I cannot find any documentation stating that it is ok or, alternatively, that it will cause issues.
I am wondering if this would be a viable option for testing setting up a new instance of the server but I do not know what issues having two TFS instances connected to the same data layer / database may cause (or if its even possible).