diff --git a/backend/src/main/java/com/designhub/service/TaskService.java b/backend/src/main/java/com/designhub/service/TaskService.java
index 6656abc..c9e2892 100644
--- a/backend/src/main/java/com/designhub/service/TaskService.java
+++ b/backend/src/main/java/com/designhub/service/TaskService.java
@@ -4455,7 +4455,7 @@ public class TaskService {
             }
             
             // 获取当前任务类型在当前品牌下的接单部门配置
-            String currentDeptKey = resolveEffectiveDeptKey(demandType, itemDto.getSelectedDeptId(), mainTask.getBrandId());
+            String currentDeptKey = resolveEffectiveDeptKey(demandType, itemDto.getSelectedDeptId(), task.getBrandId());
             
             // 🔥 构建分组键：部门 + 设计师（如果指定了设计师）
             String currentGroupKey;
@@ -4507,7 +4507,7 @@ public class TaskService {
             
             // 获取部门键
             var demandType = configService.getDemandTypeById(itemDto.getTaskTypeId());
-            String deptKey = resolveEffectiveDeptKey(demandType, itemDto.getSelectedDeptId(), mainTask.getBrandId());
+            String deptKey = resolveEffectiveDeptKey(demandType, itemDto.getSelectedDeptId(), task.getBrandId());
             if (deptKey == null) deptKey = "null";
             
             // 记录分组到部门的映射