# 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="/files/Uf8OqvRVlkoIUjFTnLbi" 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.


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