Trouble with DNS server

Good morning and sorry for my bad english 🙂

I have 2 AD/DNS servers in 2016.

In terms of DNS cleaning, it is configured to clean records older than 7 days. The configuration is good at the server level and on the DNS zones.

When I run a cleanup manually, I see that it works because I have event ID 2501 with deletion records.

I simply have a lot of very old DNS records, which are not static, dating for example from November and which remain. I don't understand why they are not deleted....

Any idea to understand where the problem comes from?

THANKS