fix Bug

community-service/src/main/java/com/tanpu/community/service/ThemeService.java

@@ -88,7 +88,7 @@ public class ThemeService {
             queryWrapper.lt(ThemeEntity::getCreateTime, lastEntity.getCreateTime());
         }
         if (pageSize != null) {
-            queryWrapper.last("order by create_time desc limit " + pageSize);
+            queryWrapper.last("limit " + pageSize);
         }
         return themeMapper.selectList(queryWrapper);
     }