修改bug

license/src/main/java/iot/sixiang/license/service/impl/DeviceServiceImpl.java

@@ -78,8 +78,12 @@ public class DeviceServiceImpl extends ServiceImpl<DeviceMapper, Device> impleme
         wrapper.eq(Device::getSnBind, snBind).last("limit 1");
         Device deviceTemp = deviceMapper.selectOne(wrapper);
         if (deviceTemp != null) {
+            if (deviceTemp.getSn().equals(sn)) {
+                return true;
+            } else {
                 throw new IotLicenseException(403, "该设备已绑定了" + deviceTemp.getSn());
             }
+        }
         LambdaQueryWrapper<Device> queryWrapper = new LambdaQueryWrapper<>();
         queryWrapper.eq(Device::getSn, sn).last("limit 1");
         Device device = deviceMapper.selectOne(queryWrapper);