QtCreator add new QML resource file (while file already exists)

Open QtQuick project in Qt Creator. Add a resource file from resource menu, Add new.

Type in a file path of a file which already exists on disc.

Qt creator accepts the file but the "file" added to resources contains the error message produces by error in opening the file.

<RCC>
    <qresource prefix="/">
        <file>main.qml</file>
        <file>SpeedoMeter.qml&#xd;/Error in " Util.fileName('/home/jrs/work/ui/qml_ui/SpeedoMeter.qml&#xd;', 'qml')": SyntaxError: Expected token `)'</file>
    </qresource>
</RCC> 

Expected result would be to either to add the existing file, report an error or ignore the file (I wouldn't want to see the original file to be cleared because of an accident).