**Impact:**
5 - Very high
**Description & Scope of incident**
All merchants running gateway software version 20220525 were not able to process payments from 17:53 to 18:58 after applying aversion patch
**Analysis of Incident**
When applying the version patch for 20220525 it was at first reported as successful by the upgrade tool even though the patching was incomplete.
Monitoring showed a processing issue and remedial action was initiated.
**Remedial Action**
Automatic rollback was attempted but failed
Manual correction was initiated, and patching was completed at 18:58 where all services were restored.
Mitigation plan:
* Implement additional checks in the deployment automation tool to validate changes are persisted according to expectations
* Ensure integrity of auxiliary resources when performing maintenance tasks
