Yep, it required pulling the c/bs. Although I have wondered when Engs were setting the system into Supercool if they knew exactly WHAT they were doing - in fairness most did.
Salutory tale, in the sim, we used to advise against pulling the Gear Warning Horn c/b when flying with one Simulated Asymmetric. We said the danger is someone forgets to reset it.
Didn't happen in my time, but then XV304 happened and it had all the hallmarks of exactly this problem. Had the horn c/b been set, as soon as they selected 100 flap, the horn would have gone and you'd be unable to cancel it without retracting the flap lever above 70% (?) or getting locked gear.
Ho hum.