Can't change Local Connection Settings of a Virtual Network

Hello,

I have a virtual network in Azure which is connected with the Site-2-Site VPN connection option. This is working ok.

Now i need to change the settings of the Local Site (the remote subnet). However i can't edit the network. Even if i disconnect the VPN and delete the active Gateway. I still can't change settings for my remote network.

How can i change this.

Best Regards,

Ronnie