The puzzle `819-38c578c8` from #819 has to be resolved: https://github.com/php-coder/mystamps/blob/0c32c0ef2ddff5498c592abd5252e871bfc46057/src/main/java/ru/mystamps/web/service/CategoryServiceImpl.java#L103-L103 The puzzle was created by Slava Semushin on 20-Jan-18.