Han died in the 3rd F&F, if you aren't able to understand, that the idea of priquel in this particular case is to resurrect already dead heroes and make money out of them, then it's nothing to talk about.
They killed him in the 3rd chapter, but then found out, that he's a pretty lovely person, that can attract more viewers.
Look at the whole F&F - they should have closed the project after the 4th chapter, they released the 5th one - OK, it wasn't that bad, although it contained an obvious fantasy (do you need me to point out, where it was a fantasy?) but the 6th was even more of a fantasy movie, and the 7th was pure crap.
To make the obvious crap less crappy, they resurrected Han and put him into all the movies after the 3rd F&F.