• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

• Dubbo version: 2.7.3
• Operating System version: mac
• Java version: jdk 8

Steps to reproduce this issue

注册了两个配置中心，一个用的是dubbo默认配置

dubbo.registry.address=zookeeper://127.0.0.1:2181

然后自定一个注册中心:

    @Bean
    public RegistryConfig ecareConsumerConfig() {
        RegistryConfig registryConfig = new RegistryConfig();
        registryConfig.setAddress("zookeeper://127.0.0.1:2182");
        registryConfig.setGroup("dubbo");
        return registryConfig;
    }

引用时，指定了注册中心ecareConsumerConfig

    @Reference(registry = "ecareConsumerConfig")
    private UserInfoApiService userInfoApiService;

然后程序启动解析时，源码走到org.apache.dubbo.config.ReferenceConfig.init()里面注册信息都是127.0.0.1:2182，继续走，当走到startConfigCenter里面调用了ConfigManager.getInstance().refreshAll();里面的AbstractConfig.refresh()不管你是否拥有值，都将里面的值覆盖掉，变成zookeeper://127.0.0.1:2181。导致注册中心找错

Pls. provide [GitHub address] to reproduce this issue.

Expected Result

What do you expected from the above steps？

Actual Result

What actually happens?

If there is an exception, please attach the exception trace:

Just put your stack trace here!