fix

src/main/java/com/LabWork/app/MangaStore/service/MangaService.java

@@ -92,9 +92,9 @@ public class MangaService {
     public Manga deleteManga(Long id) {
         final Manga currentManga = findManga(id);
         final List<Reader> listReader = readerService.findAllReaders();
-/*        for (Reader reader : listReader){
+        for (Reader reader : listReader){
             reader.getMangas().remove(currentManga);
-        }*/
+        }
         mangaRepository.delete(currentManga);
         return currentManga;
     }