function bbp_maybe_delete_group_forum_root( $forum_id = 0 ) {

	// Bail if no forum ID
	$forum_id = bbp_get_forum_id();
	if ( empty( $forum_id ) ) {
		return;
	}

	// Get the group root
	$group_root = (int) get_option( '_bbp_group_forums_root_id', 0 );

	// Delete the group root if the forum just got deleted
	if ( $group_root === $forum_id ) {
		delete_option( '_bbp_group_forums_root_id' );
	}
}