Fix script failure for regenerate-schema when switching branches

What does this MR do and why?

Fix the failure for regenerate-schema script when switching between old branch and new branch.

See the slack help request at https://gitlab.slack.com/archives/C8HG8D9MY/p1697558577797609

Screenshots or screen recordings

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Before	After

How to set up and validate locally

• List the local branches by ascending commit date

  git branch --sort=committerdate

• Pick the first old branch

  git checkout OLD_BRANCH_NAME

• Run

  bin/rails db:reset RAILS_ENV=test
  scripts/regenerate-schema

• Check out this branch

  git checkout add-workaround-for-regenerate-schema

• Run the script and see if it's successful or not

  scripts/regenerate-schema

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.