> For the complete documentation index, see [llms.txt](https://gitbook.mor.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook.mor.org/builders/builder-subnet-setup/modifying-builder-subnets.md).

# Modifying Builder Subnets

## Transferring Ownership of a Subnet

{% hint style="warning" %}
V1 Subnets cannot be transferred from one address to another.
{% endhint %}

## Upgrading Subnets

{% hint style="warning" %}
Subnets are not automatically upgraded to the next version of the Builder Contract. When a new Builder Contract is released, Subnets are required to register a new Subnet.
{% endhint %}

## Editing Subnet Configurations

{% hint style="warning" %}
Subnet data and parameters are immutable once the Start Date is passed. If you need to change immutable subnet configurations you will need to register a new Subnet.
{% endhint %}


---

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