diff --git a/sanguo_backtest/cta_optimizer.py b/sanguo_backtest/cta_optimizer.py
index 057558d..6ef3ed6 100644
--- a/sanguo_backtest/cta_optimizer.py
+++ b/sanguo_backtest/cta_optimizer.py
@@ -191,10 +191,11 @@ def run_cta_optimization(
                     trades=None  # Not available in optimization results
                 )
                 results.append(result)
-
-                # Save each result to database
-                save_result(result, db_path=db_path)
                 combos.append({"params": params, "statistics": statistics})
+                # 不把单个 combo 存进 backtest_stats：否则每次优化会额外产生 N 条
+                # type=optimize 子记录（statistics 是单 combo stats，无 "combos" key），
+                # 污染历史任务列表，点开后 optimization-results endpoint 查 "combos"
+                # 找不到 → 空页面。combo 结果只在内存聚合，由下方 aggregate 统一持久化。
 
             except Exception as e:
                 # Bug2: log parse errors but don't save empty error records