diff --git a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/service/impl/BpmnProcessTaskServiceImpl.java b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/service/impl/BpmnProcessTaskServiceImpl.java
index a0713413e..ef7cbf2cc 100644
--- a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/service/impl/BpmnProcessTaskServiceImpl.java
+++ b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/service/impl/BpmnProcessTaskServiceImpl.java
@@ -455,7 +455,7 @@ public class BpmnProcessTaskServiceImpl implements BpmnProcessTaskService {
             task.setProcessInstanceId(parentTask.getProcessInstanceId());
             task.setTaskDefinitionKey(parentTask.getTaskDefinitionKey());
             task.setTaskDefinitionId(parentTask.getTaskDefinitionId());
-            //            task.setExecutionId(idGenerator.getNextId());
+            task.setExecutionId(parentTask.getExecutionId());
             task.setPriority(parentTask.getPriority());
             task.setCreateTime(new Date());
             log.info("流程加签父任务:{},正在创建加签子任务:{},", parentTaskId, JSONUtil.toJsonStr(Lists.newArrayList(task)));
@@ -484,11 +484,11 @@ public class BpmnProcessTaskServiceImpl implements BpmnProcessTaskService {
             taskService.addComment(dto.getTaskId(), instance.getId(), COMMENT_TYPE_ADVICE, dto.getAdvice());
             Authentication.setAuthenticatedUserId(null);
         }
-        runtimeService.setVariable(task.getExecutionId(), TASK_COMPLETE_OPERATION_TYPE + task.getId(), REJECTED);
+        runtimeService.setVariable(task.getProcessInstanceId(), TASK_COMPLETE_OPERATION_TYPE + task.getId(), REJECTED);
         saveAttachment(dto.getAttachmentList(), instance.getId(), task.getId());
-        // 多实例
+        // 多实例 TODO add by 2023/12/10 这里的判断现在来看有点多余, 空了再细想
         Activity activity;
-        if (isMultiInstance(activity = getActivity((TaskEntity) task))) {
+        if (isMultiInstance(activity = getActivity((TaskEntity) task)) && StringUtils.hasLength(task.getExecutionId())) {
             Integer currentNumberOfInstances = (Integer) runtimeService.getVariable(task.getExecutionId(),
                     NUMBER_OF_INSTANCES);
             // 不能与 deleteMultiInstanceExecution 换执行顺序