> For the complete documentation index, see [llms.txt](https://docs.coherence.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coherence.io/2.4/support/upgrading-unity-sdk/upgrade-1.4-1.5.md).

# Upgrade 1.4 -> 1.5

{% hint style="success" %}
Before upgrading, back up your project to avoid any data loss.
{% endhint %}

{% hint style="warning" %}
APIs marked as deprecated on 1.3 and earlier are removed on 1.5. Make sure your project is not using them before upgrading.
{% endhint %}

## DestroyReason.MaxReached🠚 MaxEntitiesReached

The *MaxReached* enum value of **DestroyReason** was renamed to *MaxEntitiesReached* to allow space for the new *MaxQueriesReached*.