mu:widget.showUploaded didn't work

[R1-FR]

Hello,
I have a form where user can upload pdf with widget upload and it's work.
I want to know if it's possible to show uploaded file when user come back to the form and how ?
I tried to user mu:widget.showUploaded with the property of the widget, but when i use this widget, he broke the upload and not load the other file.

this is my html :

<div class="btn-upload">
            <mu:widget.upload allowedExtensions="pdf, PDF" maximumSize="5" maximumItems="3" storage="2" property="identite" />
            <mu:widget.showUploaded property="identite" />
</div>

Can you help me ?
Thanks