Effective: Version 0.3.18 · Expected Release: Late April – Early May 2026
What's Changing
Starting with DataHub version 0.3.18, the V1 UI is being fully removed from the codebase. The V1 UI code will no longer be shipped, and the environment variables that previously allowed toggling between UI versions will no longer have any effect.
Going forward, the V2 UI will be the only supported interface for DataHub.
Why We're Making This Change
The V1 UI has been superseded by the V2 UI, which has been the default setting since early 2025. Removing the V1 UI allows us to:
- Reduce codebase complexity and streamline long-term maintenance
- Improved product experience and UI performance alongside new AI-powered features and DataHub agents
- Accelerate delivery of new features exclusively built for the V2 experience
Are You Affected?
DataHub Cloud (SaaS) customers: All SaaS customers are already running the V2 UI. No action is required on your part. This change will be applied automatically as part of your scheduled upgrade to v0.3.18.
Self-hosted customers: If your environment was previously configured to enable or allow toggling to the V1 UI, please update your configuration before upgrading. The following environment variables should be set or verified in your deployment:
THEME_V2_ENABLED=true THEME_V2_DEFAULT=true THEME_V2_TOGGLEABLE=false
If you are deploying DataHub via Helm chart, ensure the following values are set in your values.yaml
datahub-gms:
theme_v2:
enabled: true
default: true
Any customizations or workflows that depended on the V1 UI should be reviewed and validated against V2 prior to upgrading.
Questions or Concerns?
If you have questions about this change or need assistance validating your V2 UI configuration, please reach out to your Customer Success Manager or submit a support ticket.