Same frustrating problem of iPhone's App Store asking for password with an obsolete Apple username.
Specific situation:
> I had a free flashlite app loaded a couple of years back.
> App Store indicated an update
> Clicked on "update" and iPhone asked for password for obsolete username's password.
> Went through all of the "fixes" in this thread including shutting down iPhone after logging out.
> App Store still asks for obsolete username do to update.
> I was able to load new apps without the obsolete username coming up.
> My Assumption:
- The flashlite app loaded two years ago was associated
with the Apple Username at that time and nothing in the above
thread was going to change that association.
- Brute force solution:
- delete the Flashlite app (it was free anyway)
- Search and download the same flashlite app.
- Bingo, same app in place (updated) and iPhone is not asking me for password
to obsolete username anymore. At least for that app.
> We'll see if some other old apps, if they ever have any updates,
ask for the obsolete username.
Given my 48 years associated with software, I'm expecting to see this problem rise up again. (I wrote programs for Michigan State's hand-made vacuum tube computer in an Intro to Programming class in 1963, the last course in my undergrad engineering degree.)