Hi there,

I tried to do this simple upgrade from 7.15.5 to 7.15.6, but I was stopped by this screen:

I expend some time checking the Umbraco source code I found this

https://github.com/umbraco/Umbraco-CMS/blob/release-7.15.6/src/Umbraco.Core/Persistence/Migrations/Upgrades/TargetVersionSeven/DropControlIdColumn.cs

Then I checked my DB and this column is already deleted I guess this happened in pasts upgrades. Do you know any explanation why this migration is being executed with these versions? I thought these actions were run against specific version targets.

My fix:

I saw that between these version there are not DB changes, my way around this issue was:

• Manually create the entry in the migration table for 7.15.6
• Change the version number in the web.config to 7.15.6
• Restart the AppPool

I hope to see your opinions about this workaround and also ideas about why this is happening.

Thanks!!

Ale