# Adding indexing property to an existing schema

**URL:** <https://forum.weaviate.io/t/adding-indexing-property-to-an-existing-schema/10478>\
**Category:** Support\
**Tags:** python, documentation, technical\
**Created:** [February 20, 2025, 3:11pm UTC](https://forum.weaviate.io/t/adding-indexing-property-to-an-existing-schema/10478 "2025-02-20T15:11:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![AnnTade](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/anntade/32/3339_2.png) [@AnnTade](https://forum.weaviate.io/u/AnnTade)\
**Post date:** [February 20, 2025, 3:11pm UTC](https://forum.weaviate.io/t/adding-indexing-property-to-an-existing-schema/10478/1 "2025-02-20T15:11:04Z")

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I have an existing schema in weaviate that contains many objects. Recently, I’ve updated my schema with another property (Boolean). I want to add an indexing property in my schema - index\_null\_state=True. However, my question is, how do I add this property to my existing schema which already has objects, without messing up anything?

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**Author:** ![DudaNogueira](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/dudanogueira/32/7846_2.png) [@DudaNogueira](https://forum.weaviate.io/u/DudaNogueira)\
**Post date:** [February 20, 2025, 4:27pm UTC](https://forum.weaviate.io/t/adding-indexing-property-to-an-existing-schema/10478/2 "2025-02-20T16:27:48Z")

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hi @AnnTade !

Unfortunately, you can’t.

Not all collection configurations are mutable. And this one is not.

Check here for a list of mutable configurations:

> **[Collection definition | Weaviate](https://weaviate.io/developers/weaviate/config-refs/schema#mutability)**
>
> Schema Configuration in Weaviate

The path here is about creating a collection with all the changes you need and migrate your data over.

Here we have a guide on how to migrate your data:

> **[Migrate data | Weaviate](https://weaviate.io/developers/weaviate/manage-data/migrate)**
>
> Learn how to migrate data within Weaviate for easy data handling.

Let me know if this helps!

Thanks!