Hi @reforce
Welcome to the Sonos Community!
Sorry to hear of this issue you have been having with being repeatedly prompted to sign in as the system owner.
We did have a bug whereby this was happening erroneously, but it has been resolved for a while now.
There have been multiple reports from people of this still going on, but so far, I have yet to come across a case where it was not user error - though there is one where it is not yet confirmed.
The Sonos app will allow any Sonos account to sign in to any Sonos system, but only when it is logged in with the account to which the speakers are registered will the app allow configuration of the system - this is to prevent a fairly common occurrence with the older app whereby guests would randomly re-register a person’s system to their own account in an attempt to play their own music, and would then leave the system still in that state, leaving the owner wondering what on Earth is going on.
So, if you see this message, I recommend that you make doubly sure that you are in fact signing in to the app with the correct credentials - any other credentials will result in the permanent display of the message you see.
If you are positive that you are using the correct credentials, I recommend you get in touch with our technical support team who have tools at their disposal that will allow them to give you advice specific to your Sonos system and what it reports.
I hope this helps.