I can't add a group in a second configure with the same name than the first

I can't add a group in a second configure with the same name than the first

Hi,

I try to configure zoho mail but I get in a mess. I closed all accounts (admin & users, but not the group) to start again  When I started againg, the system doesn't allow me to create a group with the same name than the first try.

What can I do?

Thanks