Targets not yet defined: Qt::CorePrivate

fq@debian:~/KDEHOME/discover$ cmake .
Installing in /usr/local. Run /home/fengqing/KDEHOME/discover/prefix.sh to set the environment for discover.
CMake Error at /home/fq/Qt/6.6.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreVersionlessTargets.cmake:42 (message):
 Some (but not all) targets in this export set were already defined.

 Targets Defined: Qt::Core

 Targets not yet defined: Qt::CorePrivate

Call Stack (most recent call first):
  /home/fq/Qt/6.6.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreConfig.cmake:58 (include)
 /usr/share/cmake-3.25/Modules/CMakeFindDependencyMacro.cmake:47 (find_package)
 /home/fq/Qt/6.6.0/gcc_64/lib/cmake/Qt6/QtPublicDependencyHelpers.cmake:111 (find_dependency)
 /home/fq/Qt/6.6.0/gcc_64/lib/cmake/Qt6Widgets/Qt6WidgetsDependencies.cmake:39 (_qt_internal_find_qt_dependencies)
 /home/fq/Qt/6.6.0/gcc_64/lib/cmake/Qt6Widgets/Qt6WidgetsConfig.cmake:40 (include)
 /home/fq/Qt/6.6.0/gcc_64/lib/cmake/Qt6/Qt6Config.cmake:156 (find_package)
 CMakeLists.txt:25 (find_package)

repreduce steps:

I download the discover project by the git url of https://invent.kde.org/plasma/discover.git or git clone https://invent.kde.org/frameworks/kpackage.git

and build it on  debian 12.2.0 system.

What i need to install or configure to define   the targets  of Qt::CorePrivate ?

Please help!!!