# Ignition 8.1 upgrade from previous version 8.0.x

**URL:** <https://forum.inductiveautomation.com/t/ignition-8-1-upgrade-from-previous-version-8-0-x/39579>\
**Category:** Ignition\
**Created:** [October 11, 2020, 6:49pm UTC](https://forum.inductiveautomation.com/t/ignition-8-1-upgrade-from-previous-version-8-0-x/39579 "2020-10-11T18:49:38Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Yfactor](https://avatars.discourse-cdn.com/v4/letter/y/e79b87/32.png) [@Yfactor](https://forum.inductiveautomation.com/u/Yfactor)\
**Post date:** [October 11, 2020, 6:49pm UTC](https://forum.inductiveautomation.com/t/ignition-8-1-upgrade-from-previous-version-8-0-x/39579/1 "2020-10-11T18:49:38Z")

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Hi there, I am currently using Ignition 8.12. If I were to upgrade to 8.1(RC), will my other projects made with previous version be affected? Cheers

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [October 11, 2020, 8:20pm UTC](https://forum.inductiveautomation.com/t/ignition-8-1-upgrade-from-previous-version-8-0-x/39579/2 "2020-10-11T20:20:52Z")

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Inductive Automation tries very hard to make upgrading painless. Doesn’t always succeed for all cases.

For production systems, you should always test an upgrade on a temporary installation isolated from your real production network. Or if outage time is generous, have a plan to reinstall and restore to status quo ante if any trouble is encountered. In my opinion, this is true for all combinations of running and proposed upgrade versions.

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**Author:** ![witman](https://avatars.discourse-cdn.com/v4/letter/w/d2c977/32.png) [@witman](https://forum.inductiveautomation.com/u/witman)\
**Post date:** [October 12, 2020, 12:08am UTC](https://forum.inductiveautomation.com/t/ignition-8-1-upgrade-from-previous-version-8-0-x/39579/3 "2020-10-12T00:08:10Z")

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Installation is so fast (compared to some other HMI/SCADA packages) that it doesn’t take long to go back if you have a backup from just before the upgrade. Of course, “long” is relative to how much downtime you have available, but I generally feel safe with a 2 hour window for upgrading single installations (the painless ones–most–are more like 15 minutes).

Deactivate your license before uninstalling to make the licensing part painless.