diff --git a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/common/code/BpmnTaskRespCode.java b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/common/code/BpmnTaskRespCode.java
index 318cfb774..c8abcf322 100644
--- a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/common/code/BpmnTaskRespCode.java
+++ b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/common/code/BpmnTaskRespCode.java
@@ -28,6 +28,7 @@ public enum BpmnTaskRespCode implements IModuleRespCode {
     DUMMY_TASK_CANT_CREATED("013", "当前流程状态下, 不允许创建新的机器人节点, 实例 ID: 【{}】"),
     DUMMY_TASK_CANT_REPEAT_CREATE("014", "已存在运行中的机器人节点, 不允许重复创建!"),
     ACTIVITY_BIZ_SET_ASSIGNEE_HAS_REPEAT("015", "业务传入的指定审批人存在重复, 请主动根据 personId 去重! "),
+    DUMMY_TASK_CREATED_ERROR("016", "流程实例 ID【{}】: 不存在, 不允许创建机器人节点"),
     ;
 
     private String code;
diff --git a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomCreateDummyTaskCmd.java b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomCreateDummyTaskCmd.java
index 5ea618443..dc6fff091 100644
--- a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomCreateDummyTaskCmd.java
+++ b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomCreateDummyTaskCmd.java
@@ -31,6 +31,7 @@ import static cn.axzo.workflow.common.constant.BpmnConstants.TASK_ASSIGNEE_SKIP_
 import static cn.axzo.workflow.common.enums.BpmnFlowNodeType.NODE_ROBOT;
 import static cn.axzo.workflow.core.common.code.BpmnTaskRespCode.DUMMY_TASK_CANT_CREATED;
 import static cn.axzo.workflow.core.common.code.BpmnTaskRespCode.DUMMY_TASK_CANT_REPEAT_CREATE;
+import static cn.axzo.workflow.core.common.code.BpmnTaskRespCode.DUMMY_TASK_CREATED_ERROR;
 import static cn.axzo.workflow.core.common.code.BpmnTaskRespCode.DUMMY_TASK_CREATED_NOT_SUPPORT;
 import static org.flowable.task.api.Task.DEFAULT_PRIORITY;
 
@@ -71,6 +72,9 @@ public class CustomCreateDummyTaskCmd implements Command<String>, Serializable {
 
         HistoricProcessInstance processInstance =
                 historyService.createHistoricProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();
+        if (Objects.isNull(processInstance)) {
+            throw new WorkflowEngineException(DUMMY_TASK_CREATED_ERROR, processInstanceId);
+        }
         if (!Objects.equals(processInstance.getBusinessStatus(),
                 BpmnProcessInstanceResultEnum.PROCESSING.getStatus())) {
             throw new WorkflowEngineException(DUMMY_TASK_CREATED_NOT_SUPPORT, processInstanceId);