diff --git a/smtweb-framework/bpm/src/main/java/cc/smtweb/system/bpm/web/design/form/ModelFormDelHandler.java b/smtweb-framework/bpm/src/main/java/cc/smtweb/system/bpm/web/design/form/ModelFormDelHandler.java
index f5639fd..0311c6e 100644
--- a/smtweb-framework/bpm/src/main/java/cc/smtweb/system/bpm/web/design/form/ModelFormDelHandler.java
+++ b/smtweb-framework/bpm/src/main/java/cc/smtweb/system/bpm/web/design/form/ModelFormDelHandler.java
@@ -28,13 +28,15 @@ public class ModelFormDelHandler extends DefaultDelHandler<ModelForm> {
     @Override
     protected void delDb() {
         EntityDao<ModelForm> dao = DbEngine.getInstance().findDao(ModelForm.class);
-        listDeled = new HashSet<>(ModelFormCache.getInstance().getListByModule(id));
-        if (CommUtil.isEmpty(listDeled)) {
+        Set<ModelForm> list = new HashSet<>(ModelFormCache.getInstance().getListByModule(id));
+        if (CommUtil.isEmpty(list)) {
+            listDeled = null;
             dao.deleteEntity(id);
         } else {
+            listDeled = new HashSet<>(list);
             List<Long> ids = new ArrayList<>();
             ids.add(id);
-            for (ModelForm form: listDeled) {
+            for (ModelForm form: list) {
                 ids.add(form.getId());
             }
             dao.deleteEntity(ids);