fix

src/main/java/cn/com/qmth/scancentral/service/impl/AuthServiceImpl.java

@@ -94,7 +94,7 @@ public class AuthServiceImpl implements AuthorizationService<User>, AuthService
             throw new ParameterException("deviceName不能为空");
         }
         ScannerEntity scanner = scannerService.findByDeviceName(loginInfo.getDeviceName());
-        if(scanner!=null){
+        if(scanner!=null && !scanner.getDevice().equals(loginInfo.getDevice())){
             throw new ParameterException("deviceName已存在");
         }
         SystemConfigEntity config = systemConfigService.find();