diff --git a/yudao-module-farm/src/main/java/cn/iocoder/yudao/module/farm/dal/mysql/traceabilitycode/TraceabilityCodeMapper.java b/yudao-module-farm/src/main/java/cn/iocoder/yudao/module/farm/dal/mysql/traceabilitycode/TraceabilityCodeMapper.java
index 4c78cfb1..68b0fca6 100644
--- a/yudao-module-farm/src/main/java/cn/iocoder/yudao/module/farm/dal/mysql/traceabilitycode/TraceabilityCodeMapper.java
+++ b/yudao-module-farm/src/main/java/cn/iocoder/yudao/module/farm/dal/mysql/traceabilitycode/TraceabilityCodeMapper.java
@@ -102,6 +102,7 @@ public interface TraceabilityCodeMapper extends BaseMapperX<TraceabilityCodeDO>
                 .eqIfPresent(TraceabilityCodeDO::getCodeOutBatch, reqVO.getCodeOutBatch())
                 .eqIfPresent(TraceabilityCodeDO::getScanCodeCount, reqVO.getScanCodeCount())
                 .betweenIfPresent(TraceabilityCodeDO::getCreateTime, reqVO.getCreateTime())
+                // 按CodeOutBatch分组，选择每个分组中最新创建的记录
                 .groupBy(TraceabilityCodeDO::getCodeOutBatch)
                 .orderByDesc(TraceabilityCodeDO::getCreateTime));
     }