Upgrade duplicated all KNX entries?

I just upgraded to the latest version of HA Core (shown as core-2021.3.4) and now ALL my KNX entities have been recreated with “_2” at the end. So I have to change my entire config?

What happened and how can I fix this?

SOLVED: I fixed it by deleting all the disabled entries from the entities list and then restarting the KNX integration.