Imported VM does not show in avamar availables host [Hyper-v VSS]

Hi, 

Yesterday after a problem I did reimport an existing VM on my hyper-v cluster. 

I deleted the old one and recreated a new VM with the same name.

The VM work now perfectly but I cannot add them in Hyper-V backup because they are not in the list of available hosts. 

What can I do ? When I try to list my VM through WMI I got the problematic VM. 

Do I need to restart a service ?