WR250R first registered in 2015, manufactured in 2008

Hello guys,

I just bought (in Romania) a Yamaha WR250R first registered in Italy in 2015, to find out that was manufactured in 2008.
I found this when the documents for registering arrived from the romanian authorities. It says in the identity card "Date of fabrication: 2008".
I am a bit down about this. The bike looks brand new, with 8000 km on board. But I worry about the age. I expected 2015 and it is 2008.
I bought it for 5600 euros. I am worry about an eventual sale in the future. The dealer said that I can take it back if I want.

What do You guys think about it? What to do?

Thank you!