diff --git a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomBizSpecifyAssigneeToTaskCmd.java b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomBizSpecifyAssigneeToTaskCmd.java
index d7a7e3e2a..12e26e1db 100644
--- a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomBizSpecifyAssigneeToTaskCmd.java
+++ b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomBizSpecifyAssigneeToTaskCmd.java
@@ -55,8 +55,6 @@ public class CustomBizSpecifyAssigneeToTaskCmd implements Command<Boolean>, Seri
 
         addAssignee(commandContext, taskService, task);
 
-        RuntimeService runtimeService = processEngineConfiguration.getRuntimeService();
-        runtimeService.deleteMultiInstanceExecution(task.getExecutionId(), false);
         return true;
     }
 
@@ -94,6 +92,7 @@ public class CustomBizSpecifyAssigneeToTaskCmd implements Command<Boolean>, Seri
             //            }
         });
 
+        CustomTaskHelper.deleteMultiTask(commandContext, (TaskEntity) task);
     }
 
     private void validTask(Task task) {
diff --git a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomCountSignUserTaskCmd.java b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomCountSignUserTaskCmd.java
index 5b00500c8..c37b20158 100644
--- a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomCountSignUserTaskCmd.java
+++ b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomCountSignUserTaskCmd.java
@@ -84,6 +84,7 @@ public class CustomCountSignUserTaskCmd implements Command<Void>, Serializable {
         }
 
         CustomTaskHelper.addAttachment(commandContext, task.getProcessInstanceId(), task.getId(), attachmentList);
+        CustomTaskHelper.deleteMultiTask(commandContext, (TaskEntity) task);
         return null;
     }
 
diff --git a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomTransferUserTaskCmd.java b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomTransferUserTaskCmd.java
index e97b68f11..ee62e9a2a 100644
--- a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomTransferUserTaskCmd.java
+++ b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomTransferUserTaskCmd.java
@@ -69,6 +69,7 @@ public class CustomTransferUserTaskCmd implements Command<Void>, Serializable {
         CustomTaskHelper.addAttachment(commandContext, task.getProcessInstanceId(), task.getId(), attachmentList);
 
         CustomTaskHelper.addMultiTask(commandContext, (TaskEntity) task, targetTaskAssignee);
+        CustomTaskHelper.deleteMultiTask(commandContext, (TaskEntity) task);
         return null;
     }
 
diff --git a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/helper/CustomTaskHelper.java b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/helper/CustomTaskHelper.java
index fb3e18529..67cf95656 100644
--- a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/helper/CustomTaskHelper.java
+++ b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/helper/CustomTaskHelper.java
@@ -53,6 +53,16 @@ public class CustomTaskHelper {
         setParentTaskId(originTask, subExecution);
     }
 
+    public static void deleteMultiTask(CommandContext commandContext, TaskEntity originTask) {
+        if (Objects.isNull(originTask)) {
+            return;
+        }
+        ProcessEngineConfigurationImpl processEngineConfiguration =
+                CommandContextUtil.getProcessEngineConfiguration(commandContext);
+        RuntimeService runtimeService = processEngineConfiguration.getRuntimeService();
+        runtimeService.deleteMultiInstanceExecution(originTask.getExecutionId(), false);
+    }
+
     private static void setParentTaskId(TaskEntity originTask, Execution subExecution) {
         CommandContextUtil.getEntityCache().findInCache(TaskEntity.class).stream()
                 .filter(i -> Objects.equals(i.getExecutionId(), subExecution.getId())).findAny()