diff --git a/pipeline_llm/accounting.py b/pipeline_llm/accounting.py
index 5ba1b86..3eac9e0 100644
--- a/pipeline_llm/accounting.py
+++ b/pipeline_llm/accounting.py
@@ -193,9 +193,13 @@ async def _settle_one(sor, row):
     supplier_cost = float((result or {}).get('supplier_cost', 0) or 0)
     await _deduct_wallet(sor, row, supplier_cost)
     # 回填客户应付 + 成本侧金额 + 置已出账
+    # ⚠ note=varchar(200)：CONCAT 前必须限长——失败重试轮曾把 note 写到 ~185 字符
+    # （出账异常长文案），出账成功再 CONCAT '|accounted:'+orderid 直接 1406 溢出 →
+    # 异常回写 failed → 「修好定价也永远出不了账」死循环（2026-09-16 qwen-image-3.0-pro
+    # 39 笔实测）。LEFT(...,200) 保底：宁可截尾巴也不让成功账落不下。
     await sor.sqlExe(
         "UPDATE llm_usage SET charge=${c}$, cost=${k}$, accounting_status='accounted', "
-        "note=CONCAT(COALESCE(note,''),'|accounted:',${o}$) WHERE id=${i}$",
+        "note=LEFT(CONCAT(COALESCE(note,''),'|accounted:',${o}$),200) WHERE id=${i}$",
         {"c": float((result or {}).get('customer_amount', 0) or 0),
          "k": round(supplier_cost, 6),
          "o": str((result or {}).get('orderid', ''))[:40],