The 21-year-old had been part of the Wolves Academy set-up since joining the club from Pacos de Ferreira in July 2017 but, following three seasons of development, departs on a permanent basis.
Earlier this season, Hanne scored in consecutive PL2 games against Liverpool and Tottenham Hotspur and netted regularly in the Birmingham Senior Cup.
After spending time on loan at Grasshopper Club Zurich before lockdown, the youngster has now linked up with Gil Vicente, who finished 10th in the Portuguese Primeira Liga table last term.
All at Wolves would like to thank Boubacar for his efforts and wish him the best of luck in the future.