diff --git a/workflow-engine-common/src/main/java/cn/axzo/workflow/common/model/request/bpmn/task/BpmnTaskDelegateAssigner.java b/workflow-engine-common/src/main/java/cn/axzo/workflow/common/model/request/bpmn/task/BpmnTaskDelegateAssigner.java
index 11ae09491..2a9325e10 100644
--- a/workflow-engine-common/src/main/java/cn/axzo/workflow/common/model/request/bpmn/task/BpmnTaskDelegateAssigner.java
+++ b/workflow-engine-common/src/main/java/cn/axzo/workflow/common/model/request/bpmn/task/BpmnTaskDelegateAssigner.java
@@ -179,7 +179,7 @@ public class BpmnTaskDelegateAssigner extends BaseBpmnTaskDelegateAssigner imple
     public static BpmnTaskDelegateAssigner buildDummyAssigner(String assignee,
                                                               String assigneeType,
                                                               String assignerName) {
-        return buildDummyAssigner(assignee, assigneeType, assignerName, "system", "", NO_TENANT_ID);
+        return buildDummyAssigner(assignee, assigneeType, assignerName, "", "", NO_TENANT_ID);
     }
 
     public static BpmnTaskDelegateAssigner buildDummyAssigner(String assignee,