Objects of target "lib1" referenced but is not one of the allowed target types (EXECUTABLE, SHARED, MODULE)

CMake Error at C:/Users/qt/work/install/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:2946 (file):
  Error evaluating generator expression:
    $<TARGET_RUNTIME_DLLS:lib1>
  Objects of target "lib1" referenced but is not one of the allowed target
  types (EXECUTABLE, SHARED, MODULE).
Call Stack (most recent call first):
  C:/Users/qt/work/install/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:2761:EVAL:1 (_qt_internal_write_target_deploy_info)
  CMakeLists.txt:DEFERRED