function bbp_admin_repair_forum_meta() {

	// Define variables
	$bbp_db    = bbp_db();
	$statement = esc_html__( 'Recalculating the forum for each post… %s', 'bbpress' );
	$result    = esc_html__( 'Failed!', 'bbpress' );

	// First, delete everything.
	if ( is_wp_error( $bbp_db->query( "DELETE FROM `{$bbp_db->postmeta}` WHERE `meta_key` = '_bbp_forum_id'" ) ) ) {
		return array( 1, sprintf( $statement, $result ) );
	}

	// Post types and status
	$tpt = bbp_get_topic_post_type();
	$rpt = bbp_get_reply_post_type();

	// Next, give all the topics their parent forum id.
	if ( is_wp_error( $bbp_db->query( "INSERT INTO `{$bbp_db->postmeta}` (`post_id`, `meta_key`, `meta_value`)
			( SELECT `topic`.`ID`, '_bbp_forum_id', `topic`.`post_parent`
			FROM `$bbp_db->posts`
				AS `topic`
			WHERE `topic`.`post_type` = '{$tpt}'
			GROUP BY `topic`.`ID` )" ) ) ) {
		return array( 2, sprintf( $statement, $result ) );
	}

	// Next, give all the replies their parent forum id.
	if ( is_wp_error( $bbp_db->query( "INSERT INTO `{$bbp_db->postmeta}` (`post_id`, `meta_key`, `meta_value`)
			( SELECT `reply`.`ID`, '_bbp_forum_id', `topic`.`post_parent`
			FROM `$bbp_db->posts`
				AS `reply`
			INNER JOIN `$bbp_db->posts`
				AS `topic`
				ON `reply`.`post_parent` = `topic`.`ID`
			WHERE `topic`.`post_type` = '{$tpt}'
				AND `reply`.`post_type` = '{$rpt}'
			GROUP BY `reply`.`ID` )" ) ) ) {
		return array( 3, sprintf( $statement, $result ) );
	}

	// Complete results
	return array( 0, sprintf( $statement, esc_html__( 'Complete!', 'bbpress' ) ) );
}