Exchange 2013 Version on server newer than media

Hi

Im trying to add the Hub Transport Role on our Exchange 2013 SP1 server.

Im downloading the latest Exchange Std SP1 media from the licensing site. When i run it im being told the version on the server is newer than the media so it cant run.

Tried running via the MSI which tells me the same but to do this via add remove programs.
Add remove programs tells me this cant be done via add remove programs and to do it via the media

On the server is  Server 2012 R2 & Exchange Server 2013 CU6

Any ideas?