diff --git a/storeroom/src/main/java/com/storeroom/modules/device/service/impl/DeviceSpecParamImpl.java b/storeroom/src/main/java/com/storeroom/modules/device/service/impl/DeviceSpecParamImpl.java
index 8baa6cf..484f569 100644
--- a/storeroom/src/main/java/com/storeroom/modules/device/service/impl/DeviceSpecParamImpl.java
+++ b/storeroom/src/main/java/com/storeroom/modules/device/service/impl/DeviceSpecParamImpl.java
@@ -77,10 +77,14 @@ public class DeviceSpecParamImpl implements DeviceSpecParamService {
         String deviceId = deviceInfo.getDeviceId();
         DeviceSpecParam deviceSpecParam = deviceSpecParamRepository.findFirstByDeviceInfoId(deviceId);
         if(null == deviceSpecParam){
+            deviceSpecParam = new DeviceSpecParam();
             deviceSpecParam.setId(NanoIdUtils.randomNanoId());
             deviceSpecParam.setDeviceInfoId(deviceId);
             deviceSpecParam.setMacAddress(mac);
             deviceSpecParam = deviceSpecParamRepository.save(deviceSpecParam);
+        }else{
+            deviceSpecParam.setMacAddress(mac);
+            deviceSpecParam = deviceSpecParamRepository.saveAndFlush(deviceSpecParam);
         }
         deviceInfo.setDeviceSpecParamId(deviceSpecParam);
         deviceInfoRepository.saveAndFlush(deviceInfo);