IcingaDB duplicate entries

Hello all,
I have set up a HA Master instance. I noticed that the entries in the IcingaDB are displayed twice. In the Overview the data is displayed only once. Is this normal or have I configured something incorrectly?

In IcingaDB also sometimes checks are displayed in red, although the service is working normally.

  • Icinga DB Web version (1.0.1)
  • Icinga Web 2 version (2.11.1)
  • Web browser: Chrome
  • Icinga 2 version (r2.13.5-1)
  • Icinga DB version (v1.0.0)
  • PHP version used (PHP 7.4.3 (cli))
  • Server operating system and version: Ubuntu 20.04.5 LTS

Hi, this might help you.