# Disaster! Devices and Groups gone after 8.1.1

**URL:** <https://community.homey.app/t/disaster-devices-and-groups-gone-after-8-1-1/73921>\
**Category:** Questions & Help\
**Tags:** homey-pro\
**Created:** [December 21, 2022, 8:47am UTC](https://community.homey.app/t/disaster-devices-and-groups-gone-after-8-1-1/73921 "2022-12-21T08:47:11Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\
**Post date:** [December 21, 2022, 10:20am UTC](https://community.homey.app/t/disaster-devices-and-groups-gone-after-8-1-1/73921/4 "2022-12-21T10:20:16Z")

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You can’t go back to a previous firmware, and it’s also not possible to revert to an older version of an app with backups (backups don’t contain either firmware _or_ apps, only data).

What happens when you try to install the Group app from the app store again?

Also, have you tried a [PtP](https://community.homey.app/t/how-to-ptp/17304)?

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