diff --git a/cpte-boot-module/cpte-module-wms/src/main/java/org/cpte/modules/shipping/service/processor/PickBackProcessor.java b/cpte-boot-module/cpte-module-wms/src/main/java/org/cpte/modules/shipping/service/processor/PickBackProcessor.java
index b242d6c..9669e0e 100644
--- a/cpte-boot-module/cpte-module-wms/src/main/java/org/cpte/modules/shipping/service/processor/PickBackProcessor.java
+++ b/cpte-boot-module/cpte-module-wms/src/main/java/org/cpte/modules/shipping/service/processor/PickBackProcessor.java
@@ -113,7 +113,7 @@ public class PickBackProcessor {
         if (CollectionUtils.isEmpty(tasks)) {
             return;
         }
-        List<Long> pickDetailIds = tasks.stream().map(Task::getPickDetailId).toList();
+        List<Long> pickDetailIds = tasks.stream().map(Task::getPickDetailId).distinct().toList();
         Map<Long, PickDetail> pickDetailMap = pickDetailService.queryByPickDetailIdsToMap(pickDetailIds);
         for (Task task : tasks) {
             Pick pick = data.getPickMap().get(task.getPickId());