When migrating to new sonar LTS you lose all false positives and exceptions made over last years. In our case thousands of it that took a whole team 2 weeks of work. Losing a big portion of projects data every time you update sonar is ridiculous.
Template for a good bug report, formatted with Markdown:
- versions used
7.3 to 7.9 - error observed (wrap logs/code around triple quote ``` for proper formatting)
No project migration to a new version
https://docs.sonarqube.org/latest/instance-administration/project-move/ - steps to reproduce
As in the docs https://docs.sonarqube.org/latest/instance-administration/project-move/