I guess we can wait it out, maybe I'm missing something on trade exemption or something. Detroit has almost literally nothing that makes the salaries work unless they are already giving up on Ellenson (who the Celtics would then have to flip for nothing) or even less likely Johnson or Kennard. Maybe they could guarantee Gbinijie's contract fully and then trade him, and then the Celtics flip him.
Either way, again unless there is an exemption I'm missing, the C's have to take back enough salary that we also have to deal with Yabusele on top of renouncing everyone.