This is the first time we performed an upgrade. The more I searched for in sonarqube community, the more customers having the same troubles.
Server ID changed on upgrade? - SonarQube - Sonar Community (sonarsource.com)
In our case, the bicep deployment should not create a new db since it performs as add or update. The URL has not been touched. It is a mystery why the serverID had been refreshed. Anything you logged that could trigger serverID refresh? If so, I can monitor the logs.