You have 2 commits incorrectly signed off. To fix, first ensure you have a local copy of your branch by [checking out the pull request locally via command line](https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/checking-out-pull-requests-locally). Next, head to your local branch and run: ```bash git rebase HEAD~2 --signoff ``` Now your commits will have your sign off. Next run ```bash git push --force-with-lease origin jprakash-db/concat-tables-fix ``` Commit sha: [b2cf39b](https://github.com/databricks/databricks-sql-python/pull/647/commits/b2cf39b80c0cb53787c496d67d1b6ffe314a8bc0), Author: Jothi Prakash, Committer: Jothi Prakash; The sign-off is missing. Commit sha: [3232768](https://github.com/databricks/databricks-sql-python/pull/647/commits/3232768fb68672d5474eb4fe7bb2ab1a21862a20), Author: Jothi Prakash, Committer: Jothi Prakash; The sign-off is missing.