BuddyPress.org

I found a workaround to avoid the creation of duplicate activities for the same cpt post on updating.

function me_activity_parse_args_filter( $args = array() ) {     
    if ( !empty( $args['type'] ) && $args['type'] == 'new_your-cpt' ) {
                $activities = bp_activity_get(array(
                        'max' => 1,
                        'filter' => array(
                        'action' => 'new_your-cpt',
                        'secondary_id' =>  $args['secondary_item_id'],
                        ),
                ) );
                if (count($activities['activities'])==0) { // The cpt post doesn't have activity yet, so we set the group information
                        $args['component'] = 'groups'; // You could set this as 'component_id' in bp_activity_set_post_type_tracking_args
                        if ( !empty(bp_get_current_group_id()) ) $args['item_id'] = bp_get_current_group_id();
                        if (empty($args['content'])) $args['content'] = ' ';  // To make sure content filter applies afterwards 
                } else { // Activity already exists
                        $args['type'] = false; // Delete duplicate activity
                }
    }     
    return $args;
}
add_filter('bp_after_activity_add_parse_args', 'me_activity_parse_args_filter',10,1);