Incidentsby GlyphDisruption with some GitHub services
Dec 18, 17:36 UTCDec 18, 19:09 UTC
Duration
1h 33m
Impact
Major
Root cause
Deployment
GitHub, 90 days
69 incidents
Affected
Not listed by the vendor.
Final update
On December 18, 2025, between 16:25 UTC and 19:09 UTC the service underlying Copilot policies was degraded and users, organizations, and enterprises were not able to update any policies related to Copilot. No other GitHub services, including other Copilot services were impacted. This was due to a database migration causing a schema drift. We mitigated the incident by synchronizing the schema. We have hardened the service to make sure schema drift does not cause any further incidents, and will investigate improvements in our deployment pipeline to shorten time to mitigation in the future.
Timeline
- Resolved · Dec 18, 19:09 UTC
On December 18, 2025, between 16:25 UTC and 19:09 UTC the service underlying Copilot policies was degraded and users, organizations, and enterprises were not able to update any policies related to Copilot. No other GitHub services, including other Copilot services were impacted. This was due to a database migration causing a schema drift. We mitigated the incident by synchronizing the schema. We have hardened the service to make sure schema drift does not cause any further incidents, and will investigate improvements in our deployment pipeline to shorten time to mitigation in the future.