# Settings disappear after downgrading from Pro to OSS

**URL:** <https://community.sonatype.com/t/settings-disappear-after-downgrading-from-pro-to-oss/10780>\
**Category:** Sonatype Nexus Repository\
**Tags:** license, nexus-repository, settings\
**Created:** [June 12, 2023, 7:10am UTC](https://community.sonatype.com/t/settings-disappear-after-downgrading-from-pro-to-oss/10780 "2023-06-12T07:10:09Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![semion\_txp](https://avatars.discourse-cdn.com/v4/letter/s/3e96dc/32.png) [@semion\_txp](https://community.sonatype.com/u/semion_txp)\
**Post date:** [June 12, 2023, 7:10am UTC](https://community.sonatype.com/t/settings-disappear-after-downgrading-from-pro-to-oss/10780/1 "2023-06-12T07:10:09Z")

</div>

Hello,  
My Nexus version is 3.40.1  
I’m following the “How to downgrade” [document](https://support.sonatype.com/hc/en-us/articles/115015608967-How-to-downgrade-from-Nexus-3-Pro-to-Nexus-3-OSS), and after downgrading – all my settings, users and repos disappear and I’m presented with an empty OSS instance and the Admin password dialogue. When I revert back to Pro, the settings, users and repos are back.  
I have a S3 Blob storage in use, should be OSS-compatible.  
Realm-wise, I don’t use any Pro authentication plugins.  
How do I migrate the settings?  
Thanks in advance!

UPD (edit to add): I believe I found the problem – there is `nexus.datastore.enabled=True` in the config, and an external Postgres DB configured as a datastore, which is Pro only.  
Is there a way to migrate back to OrientDB?