It would be nice to be able to decrypt, delete old key, and create a new encryption key locally and start over.
A related issue - I just started Joplin Cloud and accidentally ran into this issue when I tried to sync to Joplin Cloud - but it is not clear how to wipe Joplin Cloud.
After wiping (manually deleting .config) from macOS and reinstalling as "clean" once I reconnect to Joplin Cloud the erroneous key repeats. To make matters worse I forgot to click save in my password manager so I no longer have the first randomly generated encryption key, so I cannot use E2EE on a new device, as well as having multiple keys and the banner warning.
Kindly see cross-post of this issue at Joplin Cloud wipe possible? - #9 by o5t6iaqo7