> For the complete documentation index, see [llms.txt](https://docs.stacksync.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stacksync.com/two-way-sync/guides/add-a-new-custom-field-to-an-existing-sync.md).

# Add a New Custom Field to an Existing Sync

{% embed url="<https://www.youtube.com/watch?v=BuGp2agb4Ww>" %}
Add a custom field in HubSpot CRM and send data to it directly from your database.
{% endembed %}