I can't create a permanent ipmp on solaris 11.4

Hi all.

I thought that, by default, command ipadm create-ipmp ipmp-name, create a permanent ipmp group.

But when I try to add an interface : ipadm add-ipmp -i net2 ipmp-name I receive an error message that say ipadm: warning: cannot add net2 to ipmp-nbu0: Persistent operation on temporary object.

If I use -t option add-ipmp command is accepted.

My contexte : I m on a guest domain, netx are virtual net created on control domain.

Where is my error ?

thanks for your help