Update transfer-account.md (dbt-labs#6388)

Hi Team! Could you take a look at the additional sentence? For developer
plans, they can only do this step if the new account owner never signed
up for a dbt cloud account.

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<!-- vercel-deployment-preview -->
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🚀 Deployment available! Here are the direct links to the updated files:


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https://docs-getdbt-com-git-transfer-of-ownership-dev-steps-dbt-labs.vercel.app/faqs/Accounts/transfer-account

<!-- end-vercel-deployment-preview -->

---------

Co-authored-by: Matt Shaver <[email protected]>

website/docs/faqs/Accounts/transfer-account.md

@@ -10,7 +10,7 @@ You can transfer your dbt Cloud [access control](/docs/cloud/manage-access/about
 
 | Account plan| Steps | 
 | ------ | ---------- | 
-| **Developer** |  You can transfer ownership by changing the email directly on your dbt Cloud profile page, which you can access using this URL when you replace `YOUR_ACCESS_URL` with the [appropriate Access URL](/docs/cloud/about-cloud/access-regions-ip-addresses) for your region and plan: `https://YOUR_ACCESS_URL/settings/profile`. Before doing this, please ensure that you unlink your GitHub profile. |
+| **Developer** |  You can transfer ownership by changing the email directly on your dbt Cloud profile page, which you can access using this URL when you replace `YOUR_ACCESS_URL` with the [appropriate Access URL](/docs/cloud/about-cloud/access-regions-ip-addresses) for your region and plan: `https://YOUR_ACCESS_URL/settings/profile`. Before doing this, please ensure that you unlink your GitHub profile. The email address of the new account owner cannot be associated with another dbt Cloud account.|
 | **Team** | Existing account admins with account access can add users to, or remove users from the owner group. | 
 | **Enterprise** | Account admins can add users to, or remove users from a group with Account Admin permissions. | 
 | **If all account owners left the company** | If the account owner has left your organization, you will need to work with _your_ IT department to have incoming emails forwarded to the new account owner. Once your IT department has redirected the emails, you can request to reset the user password. Once you log in, you can change the email on the Profile page when you replace `YOUR_ACCESS_URL` with the [appropriate Access URL](/docs/cloud/about-cloud/access-regions-ip-addresses) for your region and plan:  `https://YOUR_ACCESS_URL/settings/profile`. |