You mean your@getalby.com personal LN address? What happens when you try to update it in the dashboard?
Discussion
I can't change the email address registered with alby instead of the lightning address. The code was not sent to my email address.
It happened to me... the problem is that I created an email in protonmail and I had forgotten and when I went to update to use this new tool from alby, I put my default email and ended up creating a second account on another device, I left and restarted the process using the correct email! I completely forgot that I use another email for cryptographic matters! Could it have happened to you?
I'm using protonmail, but I don't know the cause. I'm currently getting alby to handle it.