Fix/update metadata bug in v2 config

[cvictory]

Which Issue(s) This PR Fixes

Fixes #9723

Brief Description

Firstly update SubscriptionGroup, then write to rocksdb.

How Did You Test This Change?

No need tests

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 48.21%. Comparing base (fbe9f73) to head (4952138).

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #9724      +/-   ##
=============================================
- Coverage      48.26%   48.21%   -0.05%     
+ Complexity     12171    12161      -10     
=============================================
  Files           1313     1313              
  Lines          93236    93236              
  Branches       11945    11945              
=============================================
- Hits           45002    44956      -46     
- Misses         42660    42701      +41     
- Partials        5574     5579       +5     

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[lizhimins]

Note: The update method has side effects.