qmake2cmake generates QT6 style qt_add_resources even with min QT version set to 5.15

I am using qmake2cmake to convert .PRO files to CMake files with the option --min-qt-version 5.15
In the generated CMakeLists.txt I find this style of qt_add_resources which is not supported in versions of QT <6

qt_add_resources(simple "qtpropertybrowser"
PREFIX
"/qt-project.org/qtpropertybrowser"
BASE
"../../src"
FILES
${qtpropertybrowser_resource_files}