# Modifying a collection contract

Collections created outside the Interoperable Asset Store must be updated before they can participate in asset reuse. This update adds the required royalty logic and parent–child integration functions that the protocol relies on.

This section explains how to modify an existing collection by integrating the **AbstractGamingStudioAsset** standard. You can do this in two ways: by installing the npm package or by using the source code directly. A technical checklist is also provided to help verify that the collection is fully compatible before sending reuse proposals.

Choose one of the implementation methods to complete the upgrade process.


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