When you change name of your group, the actual GroupID of the group is not changed.
- Legacy ID
- End Game - Dynamic Groups
Open Group Management, create new group and try to write something into global chat. You will see your group name is Alpha 1-1 or something like that, now open the Group Management again and change name of your group and again write something into the chat, the group name will be still Alpha 1-1 and not your new group name.