diff --git a/src/main/java/com/budwk/app/zhgh/dayofficework/tour/service/impl/TourUserAssignmentServiceImpl.java b/src/main/java/com/budwk/app/zhgh/dayofficework/tour/service/impl/TourUserAssignmentServiceImpl.java
index c5ee8641..b16438bc 100644
--- a/src/main/java/com/budwk/app/zhgh/dayofficework/tour/service/impl/TourUserAssignmentServiceImpl.java
+++ b/src/main/java/com/budwk/app/zhgh/dayofficework/tour/service/impl/TourUserAssignmentServiceImpl.java
@@ -555,8 +555,9 @@ public class TourUserAssignmentServiceImpl extends BaseServiceImpl<TourUserAssig
         }
         // 分工会代报名会占用线路成团人数，人员分配和台账写入前先做后端兜底校验。
         checkProxySignupMaxGroupPeople(matterInfo, candidateUsers);
+        final NutMap assignmentMatterInfo = matterInfo;
         List<TourUserAssignment> assignments = candidateUsers.stream()
-                .map(user -> buildAssignment(settingId, matterInfo, normalizedPersonType, user,
+                .map(user -> buildAssignment(settingId, assignmentMatterInfo, normalizedPersonType, user,
                         TourUserAssignment.ASSIGN_SOURCE_BRANCH_UNION))
                 .collect(Collectors.toList());
         if (Lang.isNotEmpty(assignments)) {