# Hubspot ### Create the external id field for Formsort In HubSpot, visit your **Data Model**.

Select a model to edit. Here we chose **Contacts**. Click **View Details**.

Next, click **View Contact settings**.

In **Setup** click **Manage contact properties**.

Click the orange **Create Property** button.

Here is an example property value that can be used:

{% hint style="info" %} **Field type** should be single-line text. {% endhint %}

Make sure **`Require unique values for this property`** is checked. The **max-character limit** needs to be at least long enough to support a UUID. After filling out the properties, save the new field.