Disruption with some GitHub services
This summary is created by Generative AI and may differ from the actual content.
Overview
Disruption with some GitHub services, specifically Copilot policies, from 16:25 UTC to 19:09 UTC on December 18, 2025, due to a database migration causing a schema drift.
Impact
Users, organizations, and enterprises were not able to update any policies related to Copilot.
Trigger
A database migration causing a schema drift.
Detection
Reports of impacted performance for some GitHub services and an increase in errors on the User and Org policy settings page when updating policies.
Resolution
Synchronizing the schema mitigated the incident. The service was hardened to prevent future incidents, and improvements in the deployment pipeline will be investigated to shorten time to mitigation in the future.
Root Cause
A database migration causing a schema drift.