DHCP leases.json keeping expired leases

[nzsambo]

Hi team, I am a massive fan of Adguard Home and use it heavily on a busy home network. For context I have 30-40 odd devices, a lot of apple with rotating macs. I have a mikrotik dhcp relay, adguard sits on the dirty side with a 300 second lease time.

I was troubleshooting a failing DHCP issue and came across this in my logs:

2025/05/20 11:15:01.638677 2801#4550667 [info] dhcp: stored 91 leases in "/opt/AdGuardHome/data/leases.json"

and indeed I have 91 leases used of my allocated 99. There are currently 34 active leases, and the rest are expired... e.g...

    {
      "expires": "2025-05-12T20:06:01+12:00",
      "ip": "192.168.10.107",
      "hostname": "p100",
      "mac": "e4:fa:c4:eb:66:d7",
      "static": false
    },
    {
      "expires": "2025-05-17T15:35:17+12:00",
      "ip": "192.168.10.143",
      "hostname": "sam-office1",
      "mac": "54:af:97:49:a2:3c",
      "static": false
    },

My question is, why does AdGuardHome DHCP not remove old leases? and is it possible to have it do so?

I last 'Reset all leases' 23 days ago.

Cheers