Some examples not compiling on iOS: "duplicate symbol for architecture arm64"

/Users/qt/RTA/Qt_6.3.0/6.3.0/ios/bin/qt-cmake -S /Users/qt/RTA/Qt_6.3.0/Examples/Qt-6.3.0/datavisualization/qmlaxisdrag -B /Users/qt/RTA/Qt_6.3.0/Examples/Qt-6.3.0/datavisualization/qmlaxisdrag/bld_ios -GNinja

[11/11] Linking CXX executable qmlaxisdrag.app/qmlaxisdrag
FAILED: qmlaxisdrag.app/qmlaxisdrag 
: && /Applications/Xcode12.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -arch arm64 -isysroot /Applications/Xcode12.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk -miphoneos-version-min=13.0 -Wl,-headerpad_max_install_names -Wl,-e,_qt_main_wrapper /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/plugins/imageformats/objects-Debug/QGifPlugin_init/QGifPlugin_init.cpp.o /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/plugins/imageformats/objects-Debug/QICNSPlugin_init/QICNSPlugin_init.cpp.o /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/plugins/imageformats/objects-Debug/QICOPlugin_init/QICOPlugin_init.cpp.o /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/plugins/platforms/objects-Debug/QIOSIntegrationPlugin_init/QIOSIntegrationPlugin_init.cpp.o /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/plugins/imageformats/objects-Debug/QJpegPlugin_init/QJpegPlugin_init.cpp.o /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/plugins/imageformats/objects-Debug/QMacHeifPlugin_init/QMacHeifPlugin_init.cpp.o /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/plugins/imageformats/objects-Debug/QMacJp2Plugin_init/QMacJp2Plugin_init.cpp.o /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/plugins/iconengines/objects-Debug/QSvgIconPlugin_init/QSvgIconPlugin_init.cpp.o /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/plugins/imageformats/objects-Debug/QSvgPlugin_init/QSvgPlugin_init.cpp.o /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/plugins/imageformats/objects-Debug/QTgaPlugin_init/QTgaPlugin_init.cpp.o /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/plugins/imageformats/objects-Debug/QTiffPlugin_init/QTiffPlugin_init.cpp.o /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/plugins/imageformats/objects-Debug/QWbmpPlugin_init/QWbmpPlugin_init.cpp.o /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/plugins/imageformats/objects-Debug/QWebpPlugin_init/QWebpPlugin_init.cpp.o /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/plugins/qmltooling/objects-Debug/QDebugMessageServiceFactoryPlugin_init/QDebugMessageServiceFactoryPlugin_init.cpp.o 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/Users/qt/RTA/Qt_6.3.0/6.3.0/ios/lib/libQt6BundledLibpng.a  /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/lib/libQt6QmlModels.a  /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/lib/libQt6PacketProtocol.a  /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/lib/libQt6Qml.a  /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/lib/libQt6Network.a  /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/lib/libQt6Core.a  -framework CoreFoundation  -framework Foundation  -lz  -lm  /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/lib/libQt6BundledPcre2.a  -framework MobileCoreServices  -framework UIKit  -framework SystemConfiguration  -framework Security && :
duplicate symbol 'QAbstractItemModelForeign::staticMetaObject' in:
    /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/lib/libQt6DataVisualizationQml.a(mocs_compilation_Release.cpp.o)
    /Users/qt/RTA/Qt_6.3.0/6.3.0/ios/lib/libQt6QmlModels.a(mocs_compilation_Release.cpp.o)
ld: 1 duplicate symbol for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed