CMake error when invoking with "-DFEATURE_schannel=ON -DFEATURE_openssl=OFF"

cmake  -G"Ninja" -DCMAKE_INSTALL_PREFIX=D:\Jenkins10\workspace\Qt\q0wx6v9\buildDir\Qt6.0.0-beta2-Windows-x86_64-VS2019-16.7.7 -DBUILD_SHARED_LIBS=ON -DCMAKE_BUILD_TYPE="Release" -DQT_QMAKE_TARGET_MKSPEC=win32-msvc -DBUILD_WITH_PCH=ON -DBUILD_EXAMPLES=OFF -DBUILD_TESTING=OFF -DFEATURE_doubleconversion=ON -DFEATURE_system_doubleconversion=OFF -DFEATURE_system_zlib=OFF -DFEATURE_system_pcre2=OFF -DFEATURE_icu=OFF -DFEATURE_opengl_dynamic=ON -DFEATURE_ssl=ON -DFEATURE_openssl=OFF -DFEATURE_schannel=ON -DFEATURE_sql_sqlite=ON -DFEATURE_sql_odbc=ON -DFEATURE_system_sqlite=OFF D:\Qt\qt-everywhere-src-6.0.0-beta2

...

CMake Error at qtbase/cmake/QtFeature.cmake:207 (message):
  Feature "schannel": Forcing to "ON" breaks its condition.
Call Stack (most recent call first):
  qtbase/cmake/QtFeature.cmake:277 (qt_feature_set_value)
  qtbase/cmake/QtFeature.cmake:461 (qt_evaluate_feature)
  qtbase/cmake/QtFeature.cmake:441 (qt_feature_module_end)
  qtbase/src/CMakeLists.txt:9 (qt_feature_evaluate_features)