# Legacy preset groups

If your organization has **legacy preset groups**, they appear in the **v1 (Legacy)** tab. Updated preset groups appear in the **v2 (New)** tab.

Legacy preset groups use an earlier schema that is incompatible with current filtering infrastructure. Migrating them ensures compatibility and enables full use of the Presets tab.

**Legacy preset groups**:

* Can be [viewed](/emedgene/emedgene-analyze-manual/settings/organization_settings_-330+/lab-workflow/preset-groups.md#view-preset-group-contents) and [downloaded](/emedgene/emedgene-analyze-manual/settings/organization_settings_-330+/lab-workflow/preset-groups.md#download-a-preset-group).
* Cannot be [edited](/emedgene/emedgene-analyze-manual/settings/organization_settings_-330+/lab-workflow/preset-groups.md#edit-a-preset-group) or [hidden](/emedgene/emedgene-analyze-manual/settings/organization_settings_-330+/lab-workflow/preset-groups.md#hide-unhide-a-preset-group).
* On v37.0+, **cannot be used in case review** **until migrated to v2 schema** (the **Presets** tab is inactive when a legacy group is applied).

## Migrate a legacy preset group to v2 schema

{% stepper %}
{% step %}

#### Download the legacy preset group configuration file

1. In **Organization Settings** → **Lab workflow** → **Preset groups** → **v1 (Legacy)** tab, locate the preset group you want to migrate.
2. Select the <i class="fa-arrow-down-from-line">:arrow-down-from-line:</i> **Download** icon on the right.

The file containing the preset group definition — including preset logic, preset names, and preset order — is downloaded in JSON format.
{% endstep %}

{% step %}

#### Upload the file as a v2 preset group

1. In **Organization Settings** → **Lab workflow** → **Preset groups** → **v2 (New)** tab select **Add new**.
2. From the dropdown, select **From file**.
3. Upload the JSON file. The system validates JSON format and schema (structure, field names, field values, and file name). If validation succeeds, the preset group is created.
   {% endstep %}
   {% endstepper %}

**Result:**

* A new **v2 preset group** is added to the **preset groups** list in the **v2 (New)** tab. It becomes available during case creation and can be [viewed](/emedgene/emedgene-analyze-manual/settings/organization_settings_-330+/lab-workflow/preset-groups.md#view-preset-group-contents), [edited](/emedgene/emedgene-analyze-manual/settings/organization_settings_-330+/lab-workflow/preset-groups.md#edit-a-preset-group), [hidden](/emedgene/emedgene-analyze-manual/settings/organization_settings_-330+/lab-workflow/preset-groups.md#hide-unhide-a-preset-group), or [downloaded](/emedgene/emedgene-analyze-manual/settings/organization_settings_-330+/lab-workflow/preset-groups.md#download-a-preset-group).
* Any presets referenced in the JSON file that do not already exist in your organization are automatically added to the presets table.
* When the migrated preset group is active in a case, the **Presets tab** becomes active again.

## Revert a migration

To delete a v2 version of a legacy preset group:

1. In **Organization Settings** → **Lab workflow** → **Preset groups** → **v1 (Legacy)** tab, locate the migrated preset group you want to revert.
2. Select the <i class="fa-arrow-u-turn-down-left">:arrow-u-turn-down-left:</i> **Revert** icon on the right.

{% hint style="info" %}
**Note:** If a migrated v2 group is [set as the default](/emedgene/emedgene-analyze-manual/settings/organization_settings_-330+/lab-workflow/default-preset-group.md), it cannot be reverted.
{% endhint %}

**Result:** The corresponding **v2** version of the **legacy** preset group is removed from the **v2 (New)** tab.


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