# GitLab: Issues with GitLab Duo in merge requests

- Impact (vendor’s label): critical
- Status: resolved
- Started: 2026-05-29 12:50 UTC · Resolved: 2026-05-29 23:41 UTC · Duration: 11 h
- Updates: 8 · Affected components: GitLab Duo
- [Vendor status page: https://status.gitlab.com/pages/incident/5b36dc6502d06804c08349f7/6a198b7a50c7630597c4d950](https://status.gitlab.com/pages/incident/5b36dc6502d06804c08349f7/6a198b7a50c7630597c4d950)
- [Company: GitLab](https://rewindex.com/company/gitlab.md)

## Timeline of updates

- **investigating** 2026-05-29 12:50 UTC: We're investigating an issue where customers using \`@GitLabDuo\` mentions in merge requests are receiving access errors. Impact has been reported across GitLab.com, Dedicated, and Self-Managed. Our team is actively investigating. We'll share another update as soon as we have more information.
- **identified** 2026-05-29 13:33 UTC: We've identified a likely root cause for the \`@GitLabDuo\` access errors in merge requests and are preparing a revert MR. We'll share another update once it's deployed.
- **monitoring** 2026-05-29 15:17 UTC: A fix has been deployed via a revert MR. We're moving the incident to Monitoring and will share another update once we can confirm it's fully resolved.
- **monitoring** 2026-05-29 17:21 UTC: We are still monitoring the deployed fix. We will share another update once we can confirm it's fully resolved. More info: https://gitlab.com/gitlab-com/gl-infra/production/-/work\_items/22228
- **identified** 2026-05-29 18:58 UTC: After monitoring, our team is still seeing some failures which is prompting additional investigation. While there has been a drop in errors, some users continue to experience issues.
- **identified** 2026-05-29 20:40 UTC: No material updates at this time. Our team is still seeing some failures which prompted additional investigation. While there has been a drop in errors, some users continue to experience issues.
- **monitoring** 2026-05-29 22:43 UTC: A fix has now been deployed that should remediate the errors. We will continue to monitor, and as long as error rates remain low, we will resolve the incident.
- **resolved** 2026-05-29 23:41 UTC: We're no longer seeing errors related to this in the logs, so we are resolving this incident. If you're still experiencing errors when using \`@GitLabDuo\` mentions in merge requests, please contact support. https://support.gitlab.com

## Rewindex changes for this incident

- 2026-05-29 12:50 UTC: [Critical incident: Issues with GitLab Duo in merge requests](https://rewindex.com/change/iec00b5f187d728.md)


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Canonical: https://rewindex.com/company/gitlab/incidents/6a198b7a50c7630597c4d950 · Markdown: https://rewindex.com/company/gitlab/incidents/6a198b7a50c7630597c4d950.md · JSON: https://rewindex.com/api/v1/companies/gitlab/incidents/6a198b7a50c7630597c4d950 · Generated 2026-10-18T10:26:08.718Z