From 7bd1e6bff1b9651ceb6157c2dac2905a1166fdc7 Mon Sep 17 00:00:00 2001
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Date: Wed, 10 Jun 2026 10:55:25 +0800
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---
 .../DocGenerateModule/GuolianContractNoGenerator.cs            | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/YLErpDAL/Modules/TradeModule/DocGenerateModule/GuolianContractNoGenerator.cs b/YLErpDAL/Modules/TradeModule/DocGenerateModule/GuolianContractNoGenerator.cs
index abfa0d4a..fb20c420 100644
--- a/YLErpDAL/Modules/TradeModule/DocGenerateModule/GuolianContractNoGenerator.cs
+++ b/YLErpDAL/Modules/TradeModule/DocGenerateModule/GuolianContractNoGenerator.cs
@@ -49,11 +49,12 @@ namespace YLErp.Modules.TradeModule.DocGenerateModule
                     return existingForTrade;
                 }
 
-                // 通过当天同类交易的 id 排序确定序号（幂等）
+                // 通过当天同客户同类交易的 id 排序确定序号（幂等），每个客户独立递增
                 var tradeDateStart = tradeDate.Date;
                 var sameDayTradesCount = dbContext.trade
                     .Count(t => t.TradeDate >= tradeDateStart
                         && t.TradeDate < tradeDateStart.AddDays(1)
+                        && t.ClientId == trade.ClientId
                         && t.OpponentRole == trade.OpponentRole
                         && t.id < trade.id);
                 var sequenceNo = sameDayTradesCount + 1;