Settings Locked Temporarily

Settings Locked Temporarily — You can’t change any of your settings until the “Metadata Update” has completed.

I can’t do anything with this warning message in setting PAGE (ADMIN).

AND

$sql = $wpdb->prepare(
			"SELECT * FROM " . static::items_table() . " WHERE source_type = %s AND (path LIKE %s OR original_path LIKE %s);"
			, static::$source_type
			, '%' . $path
			, '%' . $path
		);

This query is taking a lot of time
Any solution?