# 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*.