# T31-2026: Task Audit History Returns HTTP 500 for Older Tasks

In BIOVIA Foundation Hub 2026 HF1, audit history can fail for some older Task records in both the UI and REST API.

## Program

BIOVIA Foundation Hub 2026

## Operating System

All supported operating systems

## Description

In BIOVIA Foundation Hub 2026 HF1, audit history can fail for some older Task records in both the UI and REST API.

When the issue occurs, the /foundation/hub/api/v1/tasks/$history request returns HTTP 500, and the Hub log may report an ObjectNotFoundException for a VocabularyEntry that is still present in the system.

**Affected data:** Older Tasks that retain values in the obsolete PARENT\_TASK\_ID and/or PARENT\_TASK\_RELATIONSHIP\_ID fields. The affected relationship may reference the Review, Retest, or Split vocabulary entries.

**Cause:** A migration issue caused incorrect revision numbers in some vocabulary history records. When Hub loads an older version of an affected Task, it cannot resolve the related vocabulary entry, and the Task audit history fails to display.

## Resolution

The affected vocabulary revision data must be corrected so Hub can properly load Task audit history.

The corrective fix is targeted for BIOVIA Foundation Hub 2026 HF8 IDR1. The issue is also fixed in R2027x\_MAJOR.

If the corrective fix is not yet available and immediate remediation is required, contact BIOVIA Support. An approved database correction procedure may be provided as a permanent workaround.

Jira Change Request: SEC-12193

## How to contact BIOVIA Support

If you have any questions, please contact [BIOVIA Support](https://www.3ds.com/support/contact-your-support-center).

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