# Why can't I map back to property?

When creating a defined property, you might want to map it to an existing property from an integration instead of assigning it a static value.

However, in some cases, this isn’t possible. Here's an example:

<figure><img src="https://318687664-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FedLASfWbQxGa0eYkwALS%2Fuploads%2FJaxjjM4QsognjF2AAvVA%2FScreenshot%202025-04-10%20at%2008.23.27.png?alt=media&#x26;token=b991144f-a207-4be0-bc66-4d09575097c3" alt=""><figcaption></figcaption></figure>

#### Why does "Deal Amount" appear in the first dropdown, but not in the second one?

Defined properties can only map to **text** fields.\
If a property is a **number**, **boolean**, or **date** field, it won’t appear as an option in the second dropdown.