# Incident Report 21/05/2025

**Start:** Xena/3.0.26 (May 20, 2025)

**End:** May 21, 2025 (migration fixed and applied)

**Reach:** Applies to very large flows containing a LoopStep.

**Impact:** high - blocking

## Description

Following the release of version **`Xena/3.0.26`**, certain large flows containing a Loop step encountered execution failures.

## Causes

A recent update involved modifications to the data structure representing a flow. Typically, such changes are accompanied by a migration procedure to ensure data integrity and compatibility with the new structure.

However, under specific conditions (particularly with very large structures containing loop steps), this migration process introduced errors, resulting in the inability to execute the affected flows.

## Resolution

The migration process has been revised and re-executed to rectify all impacted flows, restoring their functionality.

## Follow-up

The Mindflow engineering team remains dedicated to maintaining platform reliability and preventing similar issues in the future. As part of our continuous improvement efforts, we will strengthen the validation mechanisms of our migration tool to identify and address potential issues proactively.