OwnCloud 10 - Encryption key migration


since I migrated to OwnCloud X today, I'm getting the following error message:
Invalid private key for Encryption App. Please update your private key password in your
personal settings to recover access to your encrypted files.

I remember that I once planned to set up file encryption once, but never activated it. Unfortunately, I don't remember the original password I used for OwnCloud back then, so I cannot update the encryption key password and thus keep receiving the error message mentioned above.

Steps to reproduce
1. Install and set up encryption in OwnCloud 8 but do not enable it
2. Migrate to OwnCloud X
3. Log into OwnCloud X

Expected behaviour
I'd like to completely remove the existing encryption keys and reset encryption to factory settings.

Did you enable the recovery key in the admin settings? Have all your users agreed to a recovery key in their personal settings? Then you might be able to use occ encryptien:decrypt-all to decrypt all files.

If you just disable the encryption your files remain encrypted, you will be able to read them, but not update them.

I finally managed to get rid of that message by executing
sudo -u www-data bash -c "php /var/www/owncloud/occ encryption:disable"

The weirdest thing is, that I never enabled server-side encryption in all these years.
Thanks for your help though!