14372 fix multi registries

[mrwangyin]

What is the purpose of the change

fix #14372

Brief changelog

Verifying this change

Checklist

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
50.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[AlbumenJ]

@chickenlj PTAL

[chickenlj]

Seems it's caused by the following change https://github.com/apache/dubbo/pull/13971/files#diff-1e44977c9c4b360c444eb20fbc5599acc73533c783c897954e068e88ab339278L117

Forgot to check config.getId()

[finefuture]

LGTM

[chickenlj]

LGTM.