Multiple Apple ID sign-in request everytime I open iTunes?

This has been going on for years, now I'm really fed up!

Everytime I open iTunes I get this, 3 or 4 times...always.

After the first time, why on Earth does it repeat the request? Twice, or 3 times?

I don't understand. Is there something I can do?

I have changed Apple IDs and passwords and iTunes has obv. changed during the years, but this issue has never gone away.