# Mender 2.4.0 to 2.6.0 upgrade loses devices

**URL:** <https://hub.mender.io/t/mender-2-4-0-to-2-6-0-upgrade-loses-devices/3456>\
**Category:** General Discussions\
**Created:** [April 3, 2021, 5:48pm UTC](https://hub.mender.io/t/mender-2-4-0-to-2-6-0-upgrade-loses-devices/3456 "2021-04-03T17:48:52Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![mterwoord](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/mterwoord/32/100_2.png) [@mterwoord](https://hub.mender.io/u/mterwoord)\
**Post date:** [April 3, 2021, 5:48pm UTC](https://hub.mender.io/t/mender-2-4-0-to-2-6-0-upgrade-loses-devices/3456/1 "2021-04-03T17:48:52Z")

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I went ahead this weekend to update our 2.4.0 mender server to 2.6.0.

All seemed to have worked well, except that, out of the 60+ devices, only 10-15 show up after the upgrade.  
Is there something that needs refreshing? Am I missing steps in the documentation?

Any help is greatly appreciated!

With kind regards,  
Matthijs ter Woord

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**Author:** ![mterwoord](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/mterwoord/32/100_2.png) [@mterwoord](https://hub.mender.io/u/mterwoord)\
**Post date:** [April 4, 2021, 8:12am UTC](https://hub.mender.io/t/mender-2-4-0-to-2-6-0-upgrade-loses-devices/3456/2 "2021-04-04T08:12:32Z")

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I should have done some more googling.

Following post contains some exta steps that might be needed when going from 2.4 to 2.5. It also fixes my problems:

> [@Mender 2.5.0 Problems with Filters, Hostnames and More](https://hub.mender.io/t/mender-2-5-0-problems-with-filters-hostnames-and-more/2683/2):
>
> Hi @ckelloug2, thanks for using Mender and I’m sorry to hear 2.5.0 is causing issues for you. Can you please try entering the deviceauth container, e.g. running: $ docker exec -it \<name of your deviceauth container\> sh Then, from the container, you can run: $ deviceauth propagate-inventory $ deviceauth propagate-inventory-statuses $ deviceauth propagate-inventory-id-data This will sync all inventory, statuses and identity\_data attributes from deviceauth to inventory. Please let us know if…

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**Author:** ![tranchitella](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/tranchitella/32/606_2.png) [@tranchitella](https://hub.mender.io/u/tranchitella)\
**Post date:** [April 4, 2021, 11:14am UTC](https://hub.mender.io/t/mender-2-4-0-to-2-6-0-upgrade-loses-devices/3456/3 "2021-04-04T11:14:30Z")

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@mterwoord correct, upgrading from 2.4 to any later version requires a full resync of the deviceauth and inventory services.