I'm using SonarQube version 5.1 and MySQL 5.6.19: Due to regulations I have to use the Long Term Support Version 4.5.4.
The problem is, that I get the following error message from SonarQube when I try to start SonarQube 4.5.4:
org.sonar.api.utils.MessageException: Database relates to a more recent version of sonar. Please check your settings.
Is there a work around for this issue?
Unfortunately, downgrade of SonarQube is not supported. Database upgrade scripts only execute in one way, from old version to new version. So in your case, you will have to start from a clean database and analyze your projects again from scratch.