cmake_dependent_option conflicting with POLICY CMP0077

I'm trying to set configure a project. By setting a non-cache variable.

This project supports uses the use of the new policy CMP0077.

However, I tried setting an option created by 'cmake_dependent_option' and it failed. With this warning:

CMake Warning (dev) at C:/Program Files/CMake/share/cmake-3.16/Modules/CMakeDependentOption.cmake:39 (option):
  Policy CMP0077 is not set: option() honors normal variables.  Run "cmake
  --help-policy CMP0077" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

  For compatibility with older versions of CMake, option is clearing the
  normal variable 'SUPER_COOL_NDA_OPTION'.
Call Stack (most recent call first):
  C:/NDA/CMakeLists.txt:90 (cmake_dependent_option)
This warning is for project developers.  Use -Wno-dev to suppress it.