Ask the Experts / Entrance glitch after using terrain generator?

Question for anyone--

 

I was using the terrain generator with the H2H7 bench, created my perfect terrain, then when I tried to move forward in the scenario editor I got an error that the "park entrance is the wrong way round or has no path leading to the map edge." I deleted the entrance/path before I used the generator, so I don't think that's the issue. Not sure why it would still think there's an active entrance somewhere, though? Is there any way to get around this?

I've had a similar issue in the past and wasn't able to find a way around it.

Other than possibly saving the landscape and then opening it with vanilla RCT and finishing the process from there.