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;