I am aware of On editing questions and invalidating answers but this is different.
In my thread Would low-grade levitation be of any use? I gave basic rules. As time went by I received a flood of questions requesting further details of the physics.
I answered these but in doing so I may have invalidated previous answers. Note this is not because I contradicted myself - it's because the answerer just assumed their own version of the physics without checking with me.
So have I dealt with this correctly? Is there a better way?
NOTE
"Unwarranted" in the title sounds a little harsh. It's not meant to be. I don't blame anyone for doing this - it's quite natural. If anyone can think of a better term I'll happily change it. (Can I change the title? I'm not sure)