The puzzle `694-424e441b` from #694 has to be resolved: https://github.com/php-coder/mystamps/blob/712c62384be3decb641e8993a8223f01b30d2f29/src/main/java/ru/mystamps/web/controller/dto/ImportSeriesForm.java#L90-L90 The puzzle was created by Slava Semushin on 08-Jul-18.