Force BuddyPress to allow unique group names only

add_filter("groups_group_name_before_save","allow_unique_names_only");
function allow_unique_names_only($name){
    global $bp;
 
  $groups=BP_Groups_Group::search_groups($name);//search groups
  $duplicate=false;
  if('group-details'==$bp->groups->current_create_step&&!empty($groups)&&$groups['total']>0){
      //we have match, but is there an exact match
      foreach($groups['groups'] as $g){
         $group=new BP_Groups_Group($g->group_id);
 
         if($group->name==$name){
              $duplicate=true;//found duplicate
              break;//break the loop;
          }
      }
if($duplicate){
        bp_core_add_message("A group with this name already exists. Please Choose another name.","error");
        bp_core_redirect( $bp->root_domain . '/' . $bp->groups->slug . '/create/step/' . $bp->groups->current_create_step . '/' );
  }
 
}
 return $name;
}