(Probably not the best title for this issue but I've no idea what to write instead)
I have this model
And I want to extrude the selected area along Z by -0.1. When I do that I end up with this
As you can see I get a "fence" along the outer edge of the model, which I don't want. I tried ticking "Disolve orthognoal edges", and that is why the fence is missing one face.
I understand why the extrude command does this, but I can't figure out how to do it properly, and preferably fast (since I have to do a lot of these hexes). Deleting the fences' vertices screws up the remaining geometry, so fixing it after the extrude command is not straight forward, at least not for a newbie like me.
Any and all pointers would be appreciated.