Group of objects - unable to Ungroup

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Hello,


I have to take back a document in which certain objects are grouped. I can't seem to ungroup them. If I select one, there are handles that are slightly different from the usual:

If I click delete, the whole group is deleted. If I click on Layout_Organiser_Selection pane, I can optionally hide elements of the group but not delete them: 

For your information it's possible tou copy it in PowerPoint and then you can ungroup it in PowerPoint.

Thanks for your help

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Bonjour,

Je dois reprendre un document dont certains objets sont groupés. Je n'arrive pas à les dégrouper. Si j'en sélectionne un, il y a des poignées légèrement différentes de l'accoutumée :