diff --git a/models/sd_iterations.json b/models/sd_iterations.json
index a597725..1590e1a 100644
--- a/models/sd_iterations.json
+++ b/models/sd_iterations.json
@@ -15,6 +15,7 @@
         {"name": "scope", "title": "迭代范围(JSON)", "type": "text"},
         {"name": "task_id", "title": "关联Pipeline任务ID", "type": "str", "length": 32},
         {"name": "status", "title": "迭代状态", "type": "str", "length": 20, "nullable": "no", "default": "'planning'"},
+        {"name": "seq_no", "title": "迭代序号", "type": "int", "nullable": "no", "default": "0"},
         {"name": "priority", "title": "优先级", "type": "int", "nullable": "no", "default": "5"},
         {"name": "started_at", "title": "开始时间", "type": "timestamp"},
         {"name": "completed_at", "title": "完成时间", "type": "timestamp"},