The puzzle `927-0d92cb6b` from #927 has to be resolved: https://github.com/php-coder/mystamps/blob/6fc61a2d20b5b13f4eb9a47e5b6f45267f5b11c2/src/main/java/ru/mystamps/web/feature/series/PurchaseAndSaleDto.java#L27-L27 The puzzle was created by Slava Semushin on 16-Jun-19.