diff --git a/src/BarCode.Web.Domain/Services/SerialNumberService.cs b/src/BarCode.Web.Domain/Services/SerialNumberService.cs
index 338d41a..334dccb 100644
--- a/src/BarCode.Web.Domain/Services/SerialNumberService.cs
+++ b/src/BarCode.Web.Domain/Services/SerialNumberService.cs
@@ -491,9 +491,9 @@ namespace BarCode.Web.Domain.Services
 
                 //取出所有GenerateRecordId
 
-                var GenerateRecordIdAll = isUselist.Select(s => s.GenerateRecordId).ToList();
+                var GenerateRecordIdAll = isUselist.Select(s => s.GenerateRecordId).Distinct().ToList();
                 string spec = "";
-                GenerateRecordIdAll.Distinct();
+                 GenerateRecordIdAll.Distinct();
 
                 //  _logger.LogInformation($"获取到：GenerateRecordIdAll:{JsonConvert.SerializeObject(GenerateRecordIdAll)}");