Modify the Init logic to fix the migration case error.

[blackpiglet]

Thank you for contributing to Velero!

Please add a summary of your change

Does your change fix a particular issue?

Fixes #(issue)

Please indicate you've done the following:

• Accepted the DCO. Commits without the DCO will delay acceptance.
• Created a changelog file (make new-changelog) or comment /kind changelog-not-required on this PR.
• Updated the corresponding documentation in site/content/docs/main.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.09%. Comparing base (b661ed7) to head (68e381d).
Report is 2 commits behind head on release-1.15.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.15    #8544      +/-   ##
================================================
- Coverage         59.11%   59.09%   -0.03%     
================================================
  Files               367      367              
  Lines             39118    39118              
================================================
- Hits              23126    23118       -8     
- Misses            14523    14530       +7     
- Partials           1469     1470       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.