Update Problem from 31.0.1 to 31.0.2 (Delete old files)

[chrissi55]

Delete old files core/shipped.json is not available

I got the same error on an upgrade from 21.0.3 tot 21.0.4. I copied recreated the folder ‘core’ and copied shipped.json and signature.json from a backup into the folder. Don’t forget to check ‘www-data’ ownership… Then a ‘retry upgrade’ finished without further issues.