[Cherry-pick] check mo_pubs's existence before migrate (#20184)

[ck89119]

What type of PR is this?

• [ ] API-change
• [x] BUG
• [ ] Improvement
• [ ] Documentation
• [ ] Feature
• [ ] Test and CI
• [ ] Code Refactoring

Which issue(s) this PR fixes:

issue #20161

What this PR does / why we need it:

check mo_pubs's existence before migrate

[ck89119]

@mergifyio refresh

[mergify[bot]]

refresh

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