Misha focused on maintaining data integrity within the nhsuk/manage-vaccinations-in-schools repository by addressing a workflow issue in the patient changesets process. During the month, Misha reverted a deduplication change in the CommitPatientChangesetsJob, restoring the possibility of duplicate parent entries with the same email in a single file. This adjustment prioritized risk mitigation and regression protection, ensuring downstream systems remained compatible. Misha updated the Ruby on Rails backend code and corresponding tests to reflect the revised logic, documenting the behavioral change for release notes and communicating its impact to relevant teams. The work demonstrated careful attention to stability and process transparency.