2

src/main/java/com/izouma/nineth/service/CollectionService.java

@@ -666,16 +666,16 @@ public class CollectionService {
                     }else if (dateTime.equals(collectionDTO.getStartTime())){
                         collectionDtoList.add(collectionDTO);
                     }else {
-                        map.put(dateTime,collectionDtoList);
+                        map.put(dateTime,new ArrayList<>(collectionDtoList));
                         dateTime = collectionDTO.getStartTime();
                         collectionDtoList.clear();
                         collectionDtoList.add(collectionDTO);
                     }
                 }
-                map.put(dateTime,collectionDtoList);
+                map.put(dateTime,new ArrayList<>(collectionDtoList));
                 subscribeListDTOS.add(SubscribeListDTO.builder()
                         .dateTime(pageNew.getContent().get(0).getStartTime())
-                        .collectionDTOS(map)
+                        .collectionDTOS(new HashMap<>(map))
                         .build());
             }
             if (!map.isEmpty()){