diff --git a/src/Shentun.Peis.Domain/Devices/DeviceManager.cs b/src/Shentun.Peis.Domain/Devices/DeviceManager.cs
index 6035b2a..ff288e1 100644
--- a/src/Shentun.Peis.Domain/Devices/DeviceManager.cs
+++ b/src/Shentun.Peis.Domain/Devices/DeviceManager.cs
@@ -75,7 +75,7 @@ namespace Shentun.Peis.Devices
             DataHelper.CheckEntityIsNull(sourceEntity);
             Verify(targetEntity);
 
-            var existEntity = await _deviceRepository.FirstOrDefaultAsync(o => o.DeviceCode == sourceEntity.DeviceCode && o.Id != sourceEntity.Id);
+            var existEntity = await _deviceRepository.FirstOrDefaultAsync(o => o.DeviceCode == sourceEntity.DeviceCode && o.Id != targetEntity.Id);
             if (existEntity != null)
             {
                 throw new UserFriendlyException("编码已存在");