The issue has been resolved. Terraform & Kubernetes operator users should no longer experience 400 errors when using aiven_pg_database. We apologize for any inconvenience caused.
The issues affecting KRaft migrations during Kafka 3.8 to 3.9 upgrades have been resolved.
Fixes have been deployed, migrations have been re-enabled, and services have remained stable during monitoring.
If you are experiencing any issues, please contact support.