> For the complete documentation index, see [llms.txt](https://developer.collibra.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.collibra.com/api/guides/working-with-the-import-api-v2/synchronization/update-discovery.md).

# Update discovery

The update discovery feature identifies if the same import command has already been executed during a previous import for a given resource. If so, that resource is skipped in the running import process. This allows only updates to be processed.

{% hint style="info" %}
In case any resource that is being synchronized is modified outside the synchronization process, you must remove the cache used by the update discovery feature by calling `/import/synchronize/<synchronization_id>/evict`.
{% endhint %}


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