More floors with doctor mode

Currently doctor mode stops me going above six floors.
But I have no more room in my mega Hospital.
Surely this is a bizarre limit.
I tried changing the floors in tweakables but I doesn't work. It won't let me place new elevators that reach floor seven by deleting the ones I have and replacing them. But I can smash through the bottom six floors from the roof!?!
So my suggestion is to get rid of this limit.... Please..... 🥺