I absolutely hate this

So basically I have the Lego set 42181 which now has a problem; the right leg (idk how it is said) is always up. (Left leg in comparison) I may be suggesting that it is a red piece in middle on the set (specifically the 6212053) but the thing here is if I need to disarm the entire thing or is there something else to do that doesn't implicates to go to the 77th step (btw this thing has neatly 400 steps). And to end it up, because all the legs are connected thanks to the red piece, the legs now...