diff --git a/apps/api/app/services/edit_template_service.py b/apps/api/app/services/edit_template_service.py
index ef8c72652..43cf7af99 100755
--- a/apps/api/app/services/edit_template_service.py
+++ b/apps/api/app/services/edit_template_service.py
@@ -754,8 +754,8 @@ class EditTemplateService:
             template.bump_version()  # 版本号 +1
             updated_template = self._template_repo.update(template)
 
-            # 批量删除旧的片段配置（走 repository，保证测试 stub 和真实行为一致）
-            self._clip_config_repo.delete_by_template(template_id)
+            # 批量删除旧的片段配置（外层事务统一提交）
+            self._clip_config_repo.delete_by_template(template_id, commit=False)
 
             # 创建新的片段配置
             created_configs: list[TemplateClipConfig] = []
diff --git a/packages/adapters/sqlalchemy_impl/template_clip_config_repository.py b/packages/adapters/sqlalchemy_impl/template_clip_config_repository.py
old mode 100644
new mode 100755
index 4e06c01a8..17ca3b73a
--- a/packages/adapters/sqlalchemy_impl/template_clip_config_repository.py
+++ b/packages/adapters/sqlalchemy_impl/template_clip_config_repository.py
@@ -92,14 +92,20 @@ class SQLAlchemyTemplateClipConfigRepository:
         self.session.commit()
         return True
 
-    def delete_by_template(self, template_id: str) -> int:
-        """删除模板下所有片段配置，返回删除数量"""
+    def delete_by_template(self, template_id: str, *, commit: bool = True) -> int:
+        """删除模板下所有片段配置，返回删除数量
+
+        Args:
+            template_id: 模板ID
+            commit: 是否提交事务，默认True。外层有事务控制时传False。
+        """
         count = (
             self.session.query(TemplateClipConfigModel)
             .filter(TemplateClipConfigModel.template_id == template_id)
             .delete()
         )
-        self.session.commit()
+        if commit:
+            self.session.commit()
         return count
 
     def count(self, *, template_id: Optional[str] = None) -> int:
diff --git a/tests/unit/test_edit_template_service.py b/tests/unit/test_edit_template_service.py
index 5a1d30f2d..4846b6b59 100755
--- a/tests/unit/test_edit_template_service.py
+++ b/tests/unit/test_edit_template_service.py
@@ -167,7 +167,7 @@ class StubTemplateClipConfigRepository:
     def delete(self, config_id: str) -> bool:
         return self._configs.pop(config_id, None) is not None
 
-    def delete_by_template(self, template_id: str) -> int:
+    def delete_by_template(self, template_id: str, *, commit: bool = True) -> int:
         ids = [cid for cid, c in self._configs.items() if c.template_id == template_id]
         for cid in ids:
             del self._configs[cid]