I got the site back up by renaming postgres_data_old back to postgres_data and then running ./launcher start app to start the old image.
So, I’m back to square 1, but at least the site is up.
I tried to find the duplicate key, by entering this:
select * from users WHERE username = 'DaveW';
(username = DaveW was the problem key as shown in the error message in my first post in this thread.)
The command returned just one row, one user. What am I missing?
Thanks,
Gunnar