I think it was more to do with his decision to leave Koffi's Quartier Latin and become a solo artist. Koffi initially authorised Fally to release a solo album and he authorised him to use whoever he wanted to use in Quartier Latin that's why you find that almost the entire album Droit Chemin has Quartier Latin musicians on instruments, accompanying choruses and some solo vocals.
Fally was probably convinced to start a solo career by Koffi's old time producer David Monsoh who had by then fallen out with Koffi. I think archos should explain on Monsoh's fall out with Koffi, he had explained sometime back.