Old apple Id keeps showing up on my iPhone how do you delete the old I'd?

I had an e mail address with my employer that I used on my I phone for my apple ID and when I retired I no longer have access to that e mail server. I successfully changed my apple ID but a pop up with the old ID comes up on my I phone and I do not know how to stop this pop up. My old password with the old ID doesen't work.

Have any ideas on how to fix this.