Cannot find a migration matching

[Flyer (Mirko Arena)]

Hi @Rene_Castberg,
here we come with the solution:

Upgrading to 3.8.16 from 3.8-14 or before? Read this

This guide is for subscribers to Stable updates. Rockstor upgrade from 3.8.15 to the latest release, 3.8.16 is simple. Just click on the update notification in the UI and be on your way. However, some users tend to be on prior versions and may try to upgrade directly to 3.8.16 and this will most likely break. We sent out an e-mail in advance of releasing 3.8.16 to get your system upgraded to 3.8.15 for a smooth transition. But it’s totally understandable some users couldn’t do that in time. This…

Feel free to ask if you need help

Mirko