I just bought Nikon D7200 and when importing my RAW files into Lightroom 5 it said that I need Lightroom 6.
Lightroom said you need 6? I'd like to see a screen shot of that!
In the meantime, the D7200 isn't supported by Lightroom yet.
I think somebody is reading between the lines on that message. Lightroom 5 doesn't know about Lightroom 6.